The memory of sand
|Tides, resonances, and precession: Understanding and visualizing the dynamics of black holes in binary systems.
The past decade has seen spectacular advances in our ability to model binary systems in general relativity. Both numerical and analytic techniques have now produced tools that make it possible to track many thousands of orbits of compact bodies — neutron stars and black holes — as they orbit one another and spiral inward due to the backreaction of gravitational waves on the binary. Much of the research in this field now focuses on studying these systems and seeing what can be learned from studies and observations of general relativistic binaries. In this talk, I will describe examples of the phenomena that we find characterize systems containing black holes: Tidal distortions of black hole event horizons, resonances between orbital frequencies, and precessions of the spins of binary members. Each of these phenomena is likely to play an important role in future gravitational wave measurements. I will show that these effects can be understood in very simple terms, albeit usually with some kind of special “twist” owing to the special nature of very strong gravity in general relativity.
|9/28/15||Eric Mazur||Harvard University|
|Less is More: Extreme Optics with Zero Refractive Index
Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials which support light waves that propagate with infinite phase velocity, corresponding to a refractive index of zero. This zero index can only be achieved by simultaneously controlling the electric and magnetic resonances of the nanostructure. We present an in-plane metamaterial design consisting of silicon pillar arrays, embedded within a polymer matrix and sandwiched between gold layers. Using an integrated nano-scale prism constructed of the proposed material, we demonstrate unambiguously a refractive index of zero in the optical regime. This design serves as a novel on-chip platform to explore the exotic physics of zero-index metamaterials, with applications to super-coupling, integrated quantum optics, and phase matching.
|10/5/2015||David Weitz||Harvard University|
|Universal correlation between stiffness and volume for living cells
The stiffness of cells is commonly assumed to depend on the stiffness of their surrounding: bone cells are much stiffer than neurons, and each exists in surrounding tissue that matches the cell stiffness. In this talk, I will discuss new measurements of cell stiffness, and show that that cell stiffness is strongly correlated to cell volume. This affects both the mechanics and the gene expression in the cell, and even impacts the differentiation of stem cells. To probe the effects of gene expression, I will discuss lab-on-a-chip developments that provide a full gene expression analysis at the level of individual cells. Finally, I will also discuss new measurement techniques that probe the consequences of the cell stiffness on internal cell dynamics.
|10/19/2015||Robert Caldwell||Dartmouth College|
|A new twist on cosmic fields
An unresolved problem of cosmology is to determine the physical origin of the accelerated expansion of the universe. One explanation is a cosmological constant, but this is widely regarded as a placeholder until a deeper understanding can be attained. A leading alternative theory invokes a cosmic scalar field, slowly rolling down its potential energy hill. This is more in tune with known physics, like the recently discovered Higgs; perhaps the universe is in the process of undergoing a phase transition. A similar process may also explain an inflationary period in the early universe. But now comes a new possibility, that the accelerated expansion is caused by a relic from the early universe in the form of a frozen triplet of fields, a flavor-space locked gauge field. In this case, the dynamics of the gauge field is more like a spinning top than a ball rolling down a hill. We will explore the consequences of a cosmological scenario with these fields and show that it leads to some unusual but testable predictions for the cosmic microwave background, primordial gravitational waves, and the expansion of the universe.
|Symmetry-Protected Topological Matter
It has long been known that properties of solids depend crucially on symmetry. For example, diamond and graphite, both made of carbon atoms, have vastly different properties due to the difference in crystal symmetry; a ferromagnet differs from a paramagnet in the spontaneous breaking of spin rotational symmetry. In the last decade, it has come to be recognized that quantum materials having the same symmetry can still be in distinct phases due to the difference in the topology of quantum wavefunctions. In this talk, I will describe the general concept of symmetry-protected topological matter and its prime examples including topological insulators, topological crystalline insulators and topological superconductors. Their material realizations, unique electronic properties (which can be tuned by symmetry breaking) and potential device applications will be discussed.
|11/2/2015||Leonid Glazman||Yale University|
|Nonlinear Quantum Liquids in One Dimension
The conventional description of one-dimensional quantum fluids is based on the Luttinger liquid theory. In that theory, the true energy-momentum relation of particles making up the fluid is replaced by a linear one. This simplification is crucial for the theory, and abandoning it has proven to be difficult. The talk presents a breakthrough which allows one to circumvent the difficulty. The new theory describes dynamic responses of a fluid consisting of particles with a generic spectrum. It also provides a pathway for developing kinetic theory of a quantum fluid. The developed new description is applicable to a diverse group of systems, including, for example, electrons in quantum wires, one-dimensional spin liquids, and cold atomic gases in one-dimensional traps.
|11/9/2015||Jordan Goodman||University of Maryland|
|First Results from the HAWC Gamma Ray Observatory
The High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory in the high mountains of Mexico was completed in March of 2015 and is now giving us a new view of the TeV sky. HAWC is 15 times more sensitive than the previous generation of EAS gamma-ray instruments (Milagro and ARGO) and is able to detect the Crab nebula at >5.5σ with each daily transit. In a year of operation, HAWC will have a 5σ detection sensitivity for a source of ~50mCrab. Unlike Imaging Atmospheric Cherenkov Telescopes (IACTs), HAWC operates 24hrs/day with over a 95% on-time and observes the entire overhead sky (~2sr). HAWC’s peak energy sensitivity is 2-10 TeV which is ~10x higher than IACTs such as VERITAS and HESS, which makes their observations quite complementary. This talk will describe the science of gamma-ray astronomy; describe the HAWC detector and its construction as well as showing preliminary results from the first 6 months of operation.
|11/16/2015||Vidya Madhaven||University of Illinois at Urbana-Champaign|
|Massless and Massive Electrons: Relativistic Physics in Condensed Matter Systems
Electrons in free space have a well-defined mass. Recently, a new class of materials called topological insulators were discovered, where the low energy electrons have zero mass. In fact, these electrons can be described by the same massless Dirac equation that is used to describe relativistic particles travelling close to the speed of light. In this talk I will describe our recent experimental and theoretical investigations of a class of materials called Topological Crystalline Insulators (TCIs) . TCIs are recently discovered materials [2,3] where topology and crystal symmetry intertwine to create linearly dispersing Fermions similar to graphene. To study this material we used a scanning tunneling microscope [3,4,5]. With the help of our data, I will show how zero-mass electrons and massive electrons can coexist in the same material. I will discuss the conditions to obtain these zero mass electrons as well the method to impart a controllable mass to the particles and show how our studies create a path to engineering the Dirac band gap and realizing topological quantum phenomena in TCIs.
 L. Fu, Topological Crystalline Insulators. Phys. Rev. Lett. 106, 106802 (2011).
 T. H. Hsieh et al., Topological crystalline insulators in the SnTe material class. Nat.Commun. 3, 982 (2012).
 Y. Okada, et al., Observation of Dirac node formation and mass acquisition in a topological crystalline insulator, Science 341, 1496-1499 (2013)
 Ilija Zeljkovic, et al., Mapping the unconventional orbital texture in topological crystalline insulators, Nature Physics 10, 572–577 (2014)
 Ilija Zeljkovic, et al., Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators, Nature Materials 14, 318–324 (2015)
|11/23/2015||Carlton Caves||University of New Mexico|
|Quantum-limited measurements: One physicist's crooked path from quantum optics to quantum information
Quantum information science has changed our view of quantum mechanics. Originally viewed as a nag, whose uncertainty principles restrict what we can do, quantum mechanics is now seen as a liberator, allowing us to do things, such as secure key distribution and efficient computations, that could not be done in the realistic world of classical physics. Yet there is one area, that of quantum limits on high-precision measurements, where the two faces of quantum mechanics remain locked in battle. I will trace the history of quantum-limited measurements, from the use of nonclassical light to improve the phase sensitivity of an interferometer, to the modern perspective on how quantum entanglement can be used to improve measurement precision, and finally to current ideas on quantum limits on detecting a force.
|11/30/2015||Ayana Arce||Duke University|
Revealing hidden structure at the Large Hadron Collider
|2/1/2016||S.J. Gates, Jr.||University of Maryland|
Could SUSY Be a Sign of an Evolutionary Legacy in The Fundamental Laws of Nature
|2/15/2016||Mark Messier||Indiana University|
|Next Questions in Neutrino Physics and the NOvA Experiment
The discovery of neutrino mass in 1998 spawned a world-wide effort to better understand neutrino properties using neutrinos from the Sun, the atmosphere, reactors, and from accelerators. While much has been learned since then, several important questions remain: which neutrino is heaviest? Are there new symmetries in neutrino mixing? Do neutrinos break the symmetry between matter and antimatter? Is the framework we use to understand neutrinos complete or is there more? The NOvA experiment is designed to address each of these remaining questions and has recently begun operations. I will summarize the important factors that guided the NOvA design, show some highlights from construction, and present the first results from measurements of muon neutrino disappearance and electron neutrino appearance from the experiment.
|2/29/2016||George Becker||University of California, Riverside|
|From Reionization to Dark Matter with Quasar Absorption Lines
The majority of matter in the Universe, both baryonic and dark, resides in a vast filamentary network that pervades deep space. While dark matter dominates by mass, it is currently observed only through its gravitational effects. The baryons, in contrast, can be studied in rich detail, and their properties tell us about the interaction between galaxies and their environments, as well as the nature of the underlying dark matter. I will describe how absorption lines in the spectra of distant quasars reveal the properties of intergalactic baryons over more than 90% of cosmic history, and how this allows us to address a variety of astrophysical and cosmological questions. In particular, I will focus on our attempts to answer (1) How and when were the baryons in deep space (re-)ionized by the first galaxies? and (2) How cold (or warm) is dark matter? These projects combine data from the largest optical telescopes with advanced numerical simulations, and promise to complement next-generation efforts to study the earliest stages of cosmic galaxy and structure formation.
|3/7/2016||Liam McAllister||Cornell University|
|Inflation, String Theory, and the CMB
Two decades of progress in experimental cosmology have revealed an astonishingly sharp picture of the first moments of cosmic history. All observations agree with the broad-brush predictions of inflationary theories, and strongly suggest that quantum fluctuations of an inflation field formed the seeds for the structure in the universe. Phenomenological models of inflation are well-established, but the microphysical laws underlying inflation are unknown, and are necessarily rooted in a theory of quantum gravity, such as string theory. This connection to the physics of the Planck scale is particularly powerful in theories that give rise to detectable primordial B-mode polarization in the CMB: the B-modes are the imprint of quantum fluctuations of the gravitational field during a period of inflation at energy densities of order the GUT scale. I will describe the successes and limitations of inflation, then explain the role of quantum gravity in the study of the very early universe.
|3/21/2016||Leo Radzihovsky||University of Colorado|
|Critical matter, chiral symmetry breaking and emergent Higgs mechanism
The upshot of extensive studies of fluctuations is that their qualitative importance typically confined to isolated critical points of continuous transitions between phases of condensed matter. This conventional wisdom also predicts the number of low energy Goldstone modes based on the pattern of symmetry breaking. I will discuss condensed matter systems, that violate this standard paradigm via an emergent Higgs mechanism. Even more spectacularly, these systems exhibit “critical” ordered phases, with universal power-law properties reminiscent of continuous phase transition, but without any fine-tuning and extending throughout the ordered phase. The most interesting recent example is the twist-bend nematic liquid crystal —— a homogeneous liquid that spontaneous breaks chiral symmetry.
|4/4/2016||AO Williams Lecture: David Gross, University of California, Santa Barbara|
|The frontiers of fundamental physics
At the frontiers of physics we search for the principles that might unify all the forces of nature and we strive to understand the origin and history of the universe. In this lecture I shall describe some of the the questions that we ask and some of the proposed answers. I shall also discuss what it might mean to have a final theory of fundamental physics and whether we are capable of discovering it.
|The conformal bootstrap approach to criticality in 3 and 2+1 dimensions
The nonperturbative conformal bootstrap has re-emerged in recent years as a powerful technique to compute properties of the critical state of matter. Starting from the key assumption - that the critical theory possesses conformal symmetry - and other experimentally justifiable assumptions like the internal symmetry group and the number of relevant (in the RG sense) couplings, the conformal bootstrap allows to find allowed regions in the parameter space of the CFT data. These constraints are universal - they should be satisfied by any microscopic theory satisfying the assumptions. For some universality classes like that of the 3d Ising model and the O(N) model the constraints are surprisingly sharp, for reasons which are as yet mysterious. They provide the world’s most precise determinations of the critical exponents and transport coefficients for these models. We will review the method, which has its roots in high energy physics, and the fruitful interplay now taking place with the condensed matter physics.
|Black Holes, Gravitational Waves and LIGO
Einstein predicted the existence of gravitational waves 100 years ago. They have been recently observed from a pair of merging Black Holes by the Laser Interferometer Gravitational-wave Observatory (LIGO). The physics of gravitational waves, the detection technique, the observation and its implications will all be discussed.
|4/18/2018||Xiaoxing Xi||Temple University|
|Building Nanoscale Oxide Thin Films and Interfaces One Atomic Layer at a Time
Advancements in nanoscale engineering of oxide interfaces and heterostructures have led to discoveries of emergent phenomena and new artificial materials. Combining the strengths of reactive molecular-beam epitaxy and pulsed-laser deposition, we show that atomic layer-by-layer laser molecular-beam epitaxy significantly advances the state of the art in constructing oxide materials with atomic layer precision. Using Sr1+xTi1-xO3 and Ruddlesden–Popper phase Lan+1NinO3n+1 (n = 4) as examples, we demonstrate the effectiveness of the technique in producing oxide films with stoichiometric and crystalline perfection. By growing LaAl1+yO3 films of different stoichiometry on TiO2-terminated SrTiO3 substrate at high oxygen pressure, we show that the behavior of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface can be quantitatively explained by the polar catastrophe mechanism. In LaNiO3 films on LaAlO3 substrate with LaAlO3 buffer layer, we observed the metal insulator transition in 1.5 unit cells, which is driven by oxygen vacancies in addition to epitaxial strain and reduced dimensionality.
|5/2/1026||Joe Howard||Yale University|
|Swimming of micro-organisms: Collective motion driven by molecular motors
The beating patterns of sperm flagella and the breast-stroke like swimming strokes of cilia are driven by the molecular motor dynein. This motor protein generates sliding forces between adjacent microtubule doublets within the axoneme, the motile cytoskeletal structure. To create regular, oscillatory beating patterns, the activities of the dyneins must be coordinated, both spatially and temporally. It is thought that coordination is mediated by stresses or strains that build up within the moving axoneme, but it is not known which components of stress or strain are involved, nor how they feed back on the dyneins. To answer this question, we have measured the beating patterns of isolated, reactivate axonemes of the unicellular alga Chlamydomonas reinhardtii. We compared the measurements in wild-type and mutant cells with models derived from different feedback mechanisms. We found that regulation by changes in axonemal curvature was the only mechanism that accords with the measurements.
|"The Power of Topology in Superstring Theory" (Video)
Superstring theory is the leading candidate for the ultimate unified theory of all the matters and forces in nature. It postulates that fundamental building blocks are not point particles but strings, and it is defined in (9+1)-dimensional spacetime. The rich structure in particle physics in our (3+1) dimensions, such as quark and lepton flavors, gauge forces, and the Higgs boson to break the gauge symmetry, is expected to emerge from the geometry of the extra 6 (= 9 - 3) dimensions, called a Calabi-Yau space. We want to derive quantitative predictions on our universe from the geometry of the Calabi-Yau space. However, the Calabi-Yau space is so complicated that we do not even know an expression for its metric, namely how to measure the distance between two points on the space. Given this limitation, what can we do? In this talk, I will describe techniques we have developed to overcome this difficulty and applications of these techniques to problems in physics and mathematics.
|"Quantum life" (Video)
Nature is the great nanotechnologist: life is based on a myriad of interlinked mechanisms that operate at the molecular scale. The dynamics of these mechanisms are governed by quantum mechanics. Quantum mechanics famously exhibits strange and counterintuitive effects based on quantum coherence and entanglement. Does such `quantum weirdness' play a role in the functioning of living systems? Recent experimental investigations of photosynthesis indicate that quantum coherence may play an important role in optimizing energy transport in photosynthetic complexes. This talk presents a general theory that shows how quantum coherence can dramatically enhance energy transport in photosynthesis and in artificial systems. Optimal energy transport takes place at the point where the timescales for dynamic and static disorder converge, a phenomenon called the quantum Goldilocks effect.
|"The Maps Inside Your Head" (Video)
How do our brains make sense of a complex and unpredictable world? In this talk, I will discuss a physicist's approach to the neural topography of information processing in the brain. First I will review the brain's architecture, and how neural circuits map out the sensory and cognitive worlds. Then I will describe how highly complex sensory and cognitive tasks are carried out by the cooperative action of many specialized neurons and circuits, each of which has a simple function. I will illustrate my remarks with one sensory example and one cognitive example. For the sensory example, I will consider the sense of smell ("olfaction"), whereby humans and other animals distinguish vast arrays of odor mixtures using very limited neural resources. For the cognitive example, I will consider the "sense of place", that is, how animals mentally represent their physical location. Both examples demonstrate that brains have evolved neural circuits that exploit sophisticated principles of mathematics - principles that scientists have only recently discovered.
|9/29/14||David Goldhaber-Gordon||Stanford University||Feldman|
"Novel Phenomena Driven by Interactions and Symmetry-breaking in Graphene" (Video)
* Insulating behavior at the charge neutrality point at zero magnetic field 
"Terrestrial Gamma-Ray Flashes: Particle accelerators in our atmosphere" (Video)
In terms of visiting with faculty, I would be interested in meeting with anyone who is interested in meeting with me! I have interest in but not expertise in elementary particle experiments and theory. In addition to working in space-based gamma-ray astrophysics I am also involved in the Cherenkov Telescope Array and I think there would be some common interests with Prof. Gaitskell in the area of dark matter detection and with Prof. Koushiappas because of our common interest in Fermi.
|| Texas A&M University
"Bose-Einstein condensation of spin waves in YIG" (Video)
|10/27/14||Nandini Trivedi||Ohio State University||Valles|
| "Quantum Fluctuations and Phase Transitions" (video)
I will discuss the role of quantum fluctuations in driving phase transitions and contrast them with the better understood thermally driven phase transitions. I will show how standard paradigms break down and novel phases of matter emerge in the context of superconductor-insulator phase transitions and discuss our predictions for experimental probes through local spectroscopies and dynamics. These concepts have overlaps with cold atoms and AdS/CFT that I will illustrate.
 Bouadim, Loh, Randeria and Trivedi, “Single- and two-particle energy gaps across the disorder-driven superconductor–insulator transition”, Nature Physics 7, 884 (2011).
 Swanson, Loh, Randeria and Trivedi, “Dynamical Conductivity across the Disorder-Tuned Superconductor-Insulator Transition”, Phys. Rev. X 4, 021007 (2014)
|"Cosmology as a Probe of Physics Beyond the Standard Model" (video)
Abstract: Cosmological observations provide overwhelming evidence that our universe is almost entirely comprised of dark energy and dark matter, both of which have no theoretical explanation within the standard model of particle physics. The former is responsible for a current period of cosmic acceleration, much like that which occurred in the earliest moments of the universe. The early period of cosmic acceleration, known as inflation, was vital in providing the primordial seeds from which galaxies and clusters formed, whereas the late time acceleration could eventually lead to the vanishing of most structure in the universe. The driving force behind cosmic acceleration, as well as dark matter, still remains elusive from the point of view of a microscopic theory. Combined with fundamental questions, such as the origin of particle mass and how electroweak symmetry is broken, these conundrums require physics beyond the standard model. In this talk I will review both the theoretical and observational status of these issues with an emphasis on the excitement surrounding current and upcoming experiments.
|"Emergence from frustration: spin liquid and high temperature superconductivity" (video)
I shall describe some recent development in frustrated spin systems and show that these are prime examples of the notion of emergence: novel particles and fields not present in the original Hamiltonian emerging at low energy. I then show that some of these ideas may be applied to understand the pseudo-gap phase of high temperature superconductors.
|11/17/14||Eric Mazur (MIT) - CANCELLED|
|11/24/14||James Olsen||Princeton University||Landsberg|
|"Nature of the New Boson: a lonely Higgs, or one of many cousins?" (video)
Recent measurements from the ATLAS and CMS experiments indicate that the new boson discovered in 2012 at the Large Hadron Collider (LHC) at CERN is a Higgs boson. In the standard model of particle physics, one Higgs boson is sufficient to give mass to the W and Z particles, as well as the fundamental fermions (quarks and leptons), while also ensuring that the photon remains massless. Although this is the most economical scenario that explains electroweak symmetry breaking and the origin of fundamental particle masses, motivated extensions of the standard model predict multiple Higgs bosons with a rich phenomenology that could be detectable at the LHC. In this colloquium I will present an overview of what we have learned about the Higgs boson from measurements based on the 2011-2012 data run, discuss the status of searches for additional Higgs particles, and close with a brief summary of prospects for the coming LHC run at higher energy scheduled to begin in spring, 2015.
|12/1/14||Savvas Koushiappas||Brown University||Valles|
"The structure of the universe as a link between cosmology and dark matter physics"
|9/9/13||Stephon Alexander||Dartmouth College||Valles & Jevicki|
|"Observational and Theoretical Implications of a Parity Violating Universe"
So far, only the weak interaction maximally violates parity symmetry. In this colloquium, after a pedagogical overview of modern cosmology, we will explore the possibility that the gravitational force may also violate parity. I show that in the context of early universe cosmology, this parity violation, revealed through gravitational waves during the epoch of cosmic inflation, can explain the observed cosmic matter-anti matter asymmetry. I also discuss current and future CMB polarization experiments which will attempt to detect the signals of cosmic parity violation.
|9/16/13||Baylor Fox-Kemper||Brown University||Marston|
|"Modeling the Earth: Physics, Dynamics, and Numerics"
Not so long ago, the modeling of the atmosphere, ocean, cryosphere, and other components of the Earth System were carried out by distinct groups of investigators with relatively narrow research goals in understanding their own "sphere." However, the drive to understand the climate, and particularly human influences on climate now and in possible future scenarios has led to climate modeling of much grander scope and ambition. I will present the ingredients of a climate model, from the simplest planetary energy balance models to a schematic of the present day models. I will present some of my own work in improving these models and present prospects for future improvements, through better computers and through better understanding.
|9/23/13||Steven Carlip||UC Davis||Lowe|
|"Spontaneous Dimensional Reduction?"
The general theory of relativity tells us that what we call gravity is really a manifestation of the geometry of space and time. The basic unsolved problem of quantum gravity is to understand the structure of this spacetime at the smallest scales.
Several recent lines of evidence hint that spacetime at very small distances may undergo "spontaneous dimensional reduction," behaving as if it had only two dimensions rather than four. I will summarize some of the evidence for this strange behavior, and discuss a further argument based on the effect of quantum fluctuations on light cones. If this description proves to be correct, it suggests an unexpected relationship between small-scale quantum spacetime and the behavior of cosmology near a "typical" big bang.
|9/30/13||Christoph Boehme||University of Utah||Mitrovic|
|"Promises and Challenges of Organic Spintronics"
While the term “Spintronics" was originally introduced as label for technologies that represent information through spin states rather than charge states, it is nowadays oftentimes used solely in the context of spin-polarization, spin-injection, and spin-transport effects for which spin-orbit interaction plays an important role. Silicon and carbon based semiconductors display only weak spin-orbit coupling and - in the case of organic semiconductors - charge transport via hopping through strongly localized states. These materials appear at first glance therefore to be entirely unsuitable for spintronics. However, they also exhibit spin related effects not seen in materials with strong spin-orbit coupling which can be used for alternative, different approaches to spintronics based on spin-permutation symmetry states of charge carrier pairs rather than spin-polarization states. Reading spin-permutation symmetry is straight forward when pronounced spin-selection rules exist1,2. In contrast to spin-polarization, permutation symmetry does not depend directly on temperature and magnetic field strength3. Furthermore, the absence of spin-orbit coupling can also allow for long spin-coherence times and thus, the possibility to connect spintronics to an all spin based memory which may be applicable to spin-based quantum information4 concepts and for similar reasons, it allows for magnetic resonance based spin-manipulation schemes. Crucial for the successful implementation of organic spintronics will be a fundamental understanding of the microscopic electronic processes which are aimed to be utilized for this new technology, a requirement which has only partially achieved. Developing this understanding will be among the most important challenges of this field5. In this talk, our work on the development of this organic spintronics will be presented and the issues at hand as well as the progress made will be discussed.
 D. R. McCamey, H. A. Seipel, S. Y. Paik, M. J. Walter, N. J. Borys, J. M. Lupton, and C. Boehme, Nature Materials, 7, 723 (2008).
 D. R. McCamey, K. J. van Schooten, W. J. Baker, S.-Y. Lee, S.-Y. Paik, J. M. Lupton, and C. Boehme, Phys. Rev. Lett. 104, 017601 (2010).
 W. J. Baker, K. Ambal, D. P. Waters, R. Baarda, H. Morishita, K. van Schooten, D. R. McCamey, J. M. Lupton, and C. Boehme, Nature Commun. 3, 898 (2012).
 W. J. Baker, T. L. Keevers, J. M. Lupton. D. R. McCamey, and C. Boehme, Phys. Rev. Lett. 108, 267601 (2012).
 C. Boehme and J. M. Lupton, Nature Nano. 8, 612 (2013).
|10/7/13||Benjamin Wandelt||Sorbonne University||Tucker|
|Professor Wandelt is Professor and International Chair of Theoretical Cosmology at the Paris Institute for Astrophysics (IAP) at the Université Pierre et Marie Curie, Sorbonne University.
"Cosmic Past, Present, Future: Planck and Beyond"
How can we learn what banged at the Big Bang? We use astronomical observations to probe the epoch in the very early Universe where quantum fluctuations imprinted the seeds of cosmic structure. I will summarize the main results of the analysis of the cosmic microwave background temperature anisotropies as seen by the Planck mission data released in March 2013, with special emphasis on the non-Gaussianity analysis which resulted in the highest precision tests to date of physical mechanisms for the origin of cosmic structure. Then I will turn to the future and highlight the challenges and opportunities of the next generation of probes of the large scale structure of the universe aiming to piece together the outstanding puzzles of cosmic past, present, and future - with some glimpses onto the lab bench of innovative approaches that are now emerging.
|10/21/13||Nina Emery||Brown University (Department of Philosophy)||Marston|
|"Simplicity and Skepticism in Quantum Mechanics"
On a straightforward ontological reading of all viable, realist interpretations of quantum mechanics, we do not inhabit the familiar three-dimensional space of our everyday experience. Instead we inhabit a very high-dimensional configuration space. I examine the arguments for and against this sort of straightforward ontological reading, and compare the resulting theories with more familiar skeptical hypotheses, like the hypothesis that we are in the Matrix, or the hypothesis that we are part of a computer simulation.
|10/28/13||Marc Kamionkowski||John Hopkins University||Koushiappas|
|"Cosmic Beauty and Blemishes"
The vast majority of the wealth of cosmological information we have has come from power spectra (or equivalently, two-point correlation function, for the CMB temperature and for the mass distribution in the Universe today. But there is far more that can be sought in the future with the deluge of data from current and forthcoming surveys. I will discuss how the data can be used to look for new fields during inflation; to test geometrically for their properties; to seek parity breaking in the early and late Universe; to look for exotic dark-energy physics; to inquire about nontrivial cosmic topologies; to identify preferred-frame effects; etc. I will also then comment on a possible surprise in the CMB data.
|11/4/13||Richard Gaitskell||Brown University||Valles|
Professor Gaitskell will present and discuss the first results from the LUX (Large Underground Xenon) dark matter detector experiment at the Sanford Underground Research Facility in Lead, SD. Video
|11/11/13||Andreas Ludwig||UC Santa Barbara||Feldman|
|"Topological Insulators and Superconductors" (Video)
Topological Insulators (and Superconductors) are quantum phases of non-interacting Fermions which are electrical (or thermal) insulators in the bulk, but whose boundaries conduct electrical current (or heat) like a metal. These boundaries are very special and unusual conductors in that they are ("holographically") protected by the topological nature of the quantum state of the bulk material. The first examples of such phases were theoretically predicted less than a decade ago and were discovered experimentally shortly thereafter in two- and three-dimensional electronic systems. Topological Insulators have attracted significant interest as fundamentally novel electronic phases. They can be viewed as generalizations of the Two-Dimensional Integer Quantum Hall effect to systems in different dimensions and with different symmetry properties. For example, they can occur in three dimensions and in the absence of a time-reversal breaking magnetic field. - Here we give an introduction to these systems, and will explain the basic ideas underlying an exhaustive classification scheme of all Topological Insulators (and Superconductors), which links these systems of relevance for Condensed Matter laboratory experiments to a variety of general notions in Theoretical Physics and Mathematics.
|11/18/13||Lyderic Bocquet||Institut Lumière Matière, Université Lyon||Stein|
"Fluid transport at the nanoscales and application to osmotic energy harvesting" (Video)
|11/25/13||Chandrasekhar Ramanathan||Dartmouth College||Mitrovic|
|"Quantum simulation with nuclear spins" (Video)
It has been three decades since Feynman showed that a quantum computer is required to efficiently simulate a quantum system. While building a quantum computer remains a grand challenge, our improved ability to manipulate and control quantum systems has led to a resurgence of interest in quantum simulations that could help tackle problems in diverse areas such as condensed-matter physics, cosmology and quantum chemistry. In this talk I will discuss how to build quantum simulators using nuclear magnetic resonance (or NMR) techniques. While we can perform any small-scale simulation using liquid state NMR, the highly-coupled spin networks in solids allow us to perform a more limited set of large-scale analog quantum simulations. These solid state spin systems are excellent platforms on which to study the coherent dynamics of large quantum systems. I will illustrate these ideas with experimental examples, and discuss the key challenges to developing large scale, general purpose quantum simulators.
|12/2/13||Cornelia Dean||Brown University/The New York Times||Valles|
|"The Physics of The New York Times" (Video)
In modern times, few realms dominate science -- and the popular imagination -- like physics and cosmology. For more than 100 years, The New York Times has attempted to bring these fields to life for its readers. Cornelia Dean, a science writer and former Science Editor of the newspaper will discuss this coverage in a colloquium on 12/2/13. Ms. Dean, the editor of a new collection of Times articles on physics and astrophysics, will discuss how some notable stories came to be, the difficulties of writing about highly technical subjects for a lay audience, and the difficulties that lie ahead for coverage of science.
"Concrete Quarks - The Beginning of the End" (Video)
|2/10/14||Joao Guimaraes de Costa||Harvard University||Narain|
"A Closer Look at the Higgs Boson with the Large Hadron Collider" (Video)
|2/24/14||David Pine||New York University||Stein|
"Colloids with directional interactions" (Video)
|3/3/14||Raymond Brock||Michigan State University||Heintz|
"That Spin 0 Boson at CERN Changes Everything: The Future of the Energy Frontier in Particle Physics" (Video)
"Spin-Orbit Interactions for Exoplanets" (Video)
|3/17/14||Raul Jimenez||University of Barcelona||Koushiappas|
"Large scale structures, their statistics, neutrino masses and fundamental Physics" (Video)
|3/31/14||Igor Herbut||Simon Fraser University||Mitrovic|
"Fundamental physics with two-dimensional carbon" (Video)
||Robert Meyer||Brandeis University||Pelcovits|
Arthur O. Williams Lecture: "Ancient Roman Technology: The Stability of Vaulted Masonry Structures” (Video) (poster)
|4/14/14||Juan Restrepo||University of Arizona
"Estimation Challenges in Climate and the Geosciences" (Video)
|4/21/14||Ian Fisher||Stanford University
"Electronic nematic phases in high temperature superconductors" (Video)
|9/17/12||Rouven Essig||SUNY, Stony Brook||Koushiappas|
|"The Hunt for Dark Matter"
Dark matter makes up 80% of the matter in our Universe, but we have yet to learn its identity. Astrophysical probes are becoming powerful enough to inform us on some of its fundamental properties and a wide array of experiments are probing its non-gravitational interactions with ordinary matter. In this talk, I will review the astrophysical evidence for dark matter and give a broad overview of current and future direct and indirect detection experiments, as well as collider probes. I will also discuss some of the hints for dark matter at currently running experiments.
|9/24/12||Robert Hallock||University of Massachusetts, Amherst||Valles|
|"Is Solid Helium-4 an Example of a 'Supersolid'? Come, Listen, and See What You Think"
About 40 years ago it was predicted that it might be possible for solid helium to display some of the properties of a superfluid, thus there might be a 'supersolid'. Experiments in the mid to late 1970’s were negative and the prediction languished. Then in 2004 an experiment was done that was interpreted as positive evidence for the presence of a 'supersolid' in solid helium. But, the interpretation has been very controversial and other evidence has complicated the picture. After a review of some background and a few key experiments, experiments will be described that are conceptually different from all the others. These provide direct evidence to that it is possible to pass helium through a sample cell filled with solid helium . Some of the recent predictions for 'supersolid' behavior due to theorists differ substantially from the original theory of 40 years ago and these are rather consistent with our observations. This will be an experimentally oriented talk, designed to be accessible to all.
|"The Next Muon g-2 Experiment"
There is a discrepancy between the measured and expected values of an intrinsic property of the muon, its anomalous magnetic dipole moment, aka g-2. The discrepancy could be an indication of new physics beyond the current standard model of particle physics and leads to predictions that new particles will be found at the LHC. As an example, within weeks of the discovery of the Higgs at the LHC, papers were submitted correlating the Higgs to gamma gamma branching fraction with the g-2 anomaly. An extraordinary opportunity has arisen with the successful completion of the Tevatron program at Fermilab. The infrastructure used to create antiprotons can readily be repurposed to create muons. The Fermilab accelerator complex will be able to produce close to twenty times more muons than recorded by the last experiment at Brookhaven in less than two years allowing us to measure g-2 to a precision of 140 parts per billion. I will discuss the motivation for the new experiment, the technical difficulties involved in the prediction and measurement, and the progress towards mounting the new experiment.
|10/10/12||Greg Landsberg||Brown University|
|Special Colloquium: "Discovery of the Higgs Boson(?) at the Large Hadron Collider"
On July 4th, 2012 the ATLAS and CMS Collaborations at the Large Hadron Collider announced a discovery of a new boson with the mass of 125 GeV, a likely candidate for a long-sought Higgs boson. In this special colloquium I'll give an inside track of the events that lead to this fundamental discovery, explain its importance, and discuss the next steps in uncovering the true nature of the new particle.
|10/15/12||Douglas Finkbeiner||Harvard University||Koushiappas|
|"The Galactic Center 130 GeV Line: WIMP or Artifact?"
The recent claims of a gamma-ray line in the Galactic center at 130 GeV has generated excitement, not least because it could be a signal of dark matter annihilation. I will summarize the current state of the observations of the Galactic center, clusters, and unassociated halo objects, and speculate about models of particle dark matter that could
explain the data.
Electromagnetic fields carry energy, momentum, and even angular momentum. The momentum density is ε_0 (E×B), and it accounts (among other things) for the pressure of light. But even static fields can harbor momentum, and this would appear to contradict a general theorem: if the center of energy of a closed system is at rest, then its total momentum must be zero. Evidently in such cases there lurks some other momentum, not electromagnetic in nature, which cancels the field momentum. But finding this “hidden momentum” can be surprisingly subtle. I’ll discuss a particularly cute example.
|"Neutrino Physics: This Decade and Beyond"
Neutrinos are one of nature's strangest and most elusive particles. For more than 50 years, they have surprised us: not only by their mere presence, but also by the revelation that these ghostlike particles can oscillate from one type to another. This stunning discovery has opened up a host of new questions about neutrinos and their properties; questions which we will be trying to answer in the next decade and beyond. In this talk, a survey of recent experimental results will be presented, along with projections for what the future holds. If history is any indication, we are in store for an exciting ride.
|"What do the students need?"
The instruction we offer students, at any level, presumably reflects what we believe will help them understand physics. But we don’t often subject our beliefs to scrutiny. Most physics instructors work from common sense assumptions about what students need—clear explanations, demonstrations, motivation and practice. As in physics, however, common sense ideas (e.g. 'objects move because they are pushed') aren't always correct. I will present evidence that these usual assumptions are insufficient and offer an expanded set of possibilities, focusing in particular on how students understand knowledge and learning. In many cases what students most need is help taking a different approach to learning, to start thinking of science as a “refinement of everyday thinking” (Einstein, 1936) rather than as a body of new information to memorize.
||Ohio State University
|"The Puzzle of Charge and Mass"
Beginning with the seminal work of Rutherford, Geiger and Marsden in 1911, physicists have investigated the atom using particle beams (alpha particles, and protons) as probes. They developed new detection methods; the geiger counter, scintillators, cloud and then bubble chambers. This new paradigm for probing matter and new detectors led to many discoveries. To make a long story short, by 1974 the chaos of discovery lead to the Standard Model describing all observed particle phenomena in terms of three fundamental forces (4 including gravity) and the fundamental building blocks of matter, quarks and leptons. Only now, after the dust of this chaotic discovery settles, are we able with hindsight to recognize the underlying principles which define the theory we call the Standard Model. It is these principles and their logical extension which I will attempt to describe in this talk.
||University of Chicago/Fermilab
|"The Dark Energy Survey"
The Nobel Prize in Physics for 2011 was awarded for the discovery that the expansion of the Universe is accelerating. Yet the physical origin of cosmic acceleration remains a mystery. The Dark Energy Survey (DES) aims to address the questions: why is the expansion speeding up? Is cosmic acceleration due to dark energy or does it require a modification of General Relativity? If dark energy, is it the energy density of the vacuum (Einstein's cosmological constant) or something else? The Dark Energy Survey will address these questions by measuring the history of cosmic expansion and of the growth of structure through four complementary techniques: galaxy clusters, large-scale galaxy clustering, weak gravitational lensing, and supernovae. The DES collaboration has built and will employ a new, 570-megapixel, digital camera on the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory in Chile to carry out a deep, wide-area sky survey of 300 million galaxies and a narrower, time-domain survey that will discover 4000 supernovae over 525 nights starting in late 2012. I will overview the DES project, which achieved`first light' in September 2012, describe results from commissioning and science verification of the instrument, and discuss the plans and goals of the survey.
|"Geometry and Genetics"
Developmental genetics has been very successful in attaching a function to thousands of genes whose mutation can lead to developmental defects. This makes the task of quantitative modeling effectively impossible. We have instead used geometric methods from dynamical systems theory plus genetics to posit simple models of phenotype that collapse the activity of many genes onto a few parameters.
|2/11/13||John D. Monnier
||University of Michigan
|"Imaging the Surfaces of Stars"
Under even the best atmospheric conditions, telescope diffraction fundamentally limits the angular resolution for astronomical imaging. Using interferometry, we can coherently combine light from widely-separated telescopes to overcome the single-telescope diffraction limit to boost our imaging resolution by orders of magnitude. I will review recent technical and scientific breakthroughs made possible by the Michigan Infrared Combiner of the CHARA Array on Mt. Wilson, CA, with baselines of 330 meters allowing near-infrared imaging with sub-milli-arcsecond resolution. I will present the first resolved images of main sequence stars besides the Sun, focusing on the oblate and gravity-darkened photospheres of rapidly rotating stars. We can now also resolve the interacting components of close binary stars for the first time and I will highlight the recent remarkable eclipse of epsilon Aurigae as viewed by CHARA.
|"Detecting Gravitational Waves (and doing other cool physics) with Millisecond Pulsars"
The first millisecond pulsar was discovered in 1982. Since that time their use as highly-accurate celestial clocks has improved continually, so that they are now regularly used to measure a variety of general relativistic effects and probe a variety of topics in basic physics, such as the equation of state of matter at supra-nuclear densities. One of their most exciting uses though, is the current North American (NANOGrav) and international (the International Pulsar Timing Array) efforts to directly detect nanohertz frequency gravitational waves, most likely originating from the ensemble of supermassive black hole binaries scattered throughout the universe. In this talk I’ll describe how we are using an ensemble of pulsars to try to make such a measurement, how we could make a detection within the next 5-10 years, and how we get a wide variety of very interesting secondary science from the pulsars in the meantime.
||Los Alamos National Laboratory
|"India's Energy [In]Security, China's Growing Consumption, Spain's Options"
Energy security, economic development and climate security are three urgent, pressing and interconnected goals. This talk will examine how different regions of the world aim to meet their energy needs, and sustain development. This presentation will then focus on three major regions, China, India and Europe (using Spain as an example) to illustrate challenges and opportunities. Finally, it will end with some philosophical thoughts on climate change and sustainable development.
|"Levitation by Casimir Forces In and Out of Equilibrium"
A generalization of Earnshaw's theorem constrains the possibility of levitation by Casimir forces in equilibrium. The scattering formalism, which forms the basis of this proof, can be used to study fluctuation-induced forces for different materials, diverse geometries, both in and out of equilibrium. In the off-equilibrium context, I shall discuss non-classical heat transfer, and some manifestations of the dynamical Casimir effect.
||Brookhaven National Laboratory
|"Observation of Electron-antineutrino Disappearance at Daya Bay Nuclear Reactor Neutrino Experiment"
At the Daya Bay Reactor Neutrino Experiment we have measured the last unknown neutrino mixing angle, θ13, to be non-zero at the 6.2σ level, this is the most precise measurement to date. This was done using a careful optimization of the detector systems, the measurement technique and choice of experimental site. I will give a short introduction to neutrinos, what we know about them and how we know these things. I will then talk of the mathematical formalism of neutrino mixing and how we might measure the parameters of mixing. At Daya Bay we use the technique of far/near relative measurement to make a significant reduction of the systematic errors that have been a problem for previous measurements. I will describe this technique and how this drove the design of the hardware of our experiment. Lastly I will describe the backgrounds to our measurement and how they are dealt with and then, of course, the final result. If there is time I hope to discuss the implication of our measurement and what’s in store for neutrino physics.
||City College of New York
|“Searching for topological superconductivity of disordered Dirac fermions”
In the last few years there has been an explosive development in materials’ science – the discovery of a new class of insulators in three dimensions (3D) having a fully insulating electronic gap in the bulk but with metallic Dirac states on their surfaces which can carry spin/charge currents that are topologically protected against (time-reversal-invariant) disorder and perturbations. This discovery launched the search for a topological superconducting analogue characterized by a fully gapped odd parity (p-wave) pairing state that could support Majorana bound states. Such a superconducting phase has important implications for a fault-tolerant quantum computing owing to the non-Abelian exchange statistics obeyed by Majorana fermions. Recently, superconductivity below ~4 K was reported in two 2nd generation 3D topological insulators (TIs): in Bi2Se3 doped with copper and in Bi2Te3 under ~6 GPa pressure. In both cases, however, the topological nature of the superconducting phase has not yet been proved. In my talk I will discuss our most recent results on another 2nd generation TI, Sb2Te3, where we have discovered superconductivity with Tc = 8.3 K, the highest transition temperature among the TIs reported thus far. This state is obtained when the material is synthesized under modest pressure (in the MPa range) in the narrow dome-like pressure range, reminiscent of quantum criticality in other exotic superconductors. The diamagnetic state of this new superconductor is very unusual, since even in the normal state the system supports large orbital currents, while robust van Vleck-like spin response of the disordered Dirac fermions still persists in the superconducting state. We will discuss our observations in the context of recent ideas of how arbitrarily weak disorder can assist fluctuation superconductivity and turn Dirac semimetal into a superconductor.
|"Trillion Degree Matter"
In this talk I will discuss a very simple question: What are the properties of matter at extremely high temperature, in excess of several trillion Kelvin? Experiments at large particle colliders like RHIC at Brookhaven Lab and LHC at CERN have shown that such temperatures can be achieved in collisions of heavy nuclei, creating a plasma of quarks and gluons resembling the universe shortly after the Big Bang. We have found that the produced state of matter exhibits fascinating and somewhat surprising properties: Although its density exceeds that of water by 16 orders of magnitude, the quark-gluon plasma behaves like a near-perfect liquid. I will review the most striking observations made in recent LHC data and discuss the unexpected connections to strongly coupled systems in other areas of physics, ranging from string theory to ultra-cold atoms.
|4/22/13||Lord Martin Rees
||University of Cambridge
|Arthur O. Williams Lecture: “From Mars to the Multiverse” (video)
Astronomers have made astonishing progress in probing our cosmic environment. We can trace cosmic history from some mysterious 'beginning' nearly 14 billion years ago, and understand in outline the emergence of atoms, galaxies, stars and planets.
Unmanned spacecraft have visited the other planets of our Solar System (and some of their moons), beaming back pictures of varied and distinctive worlds. An exciting development in the last decade has been the realization that many other stars are orbited by retinues of planets -- some resembling our Earth.
Looking further afield, we are understanding galaxies and their nuclei in fuller detail, and can check models of their evolution by detecting objects all the way back to an epoch only a billion years after the 'big bang'. Indeed we can trace pre-galactic history with some confidence back to a nanosecond after the 'big bang'.
But the key parameters of our expanding universe -- the expansion rate, the geometry and the content -- were established far earlier still, when the physics is still conjectural but can be pinned down by future observations. These advances pose new questions: What does the long-range future hold? Should we be surprised that the physical laws permitted the emergence of complexity? and Is physical reality even more extensive than the domain that our telescopes can probe? This illustrated lecture will attempt to address such issues.
||University of Massachusetts, Amherst
|"Wandering amongst the Feynman Diagrams"|
||Brookhaven National Laboratory
|"Physics of the Intensity Frontier"|
||Michigan State University
|"Seeking the Origin of Mass: Higgs Searches at Colliders"|
|"Going to the ends of the earth to glimpse the beginnings of time: Observing the Big Bang with the BICEP Telescope at the South Pole"|
|"Maximum Entropy and the Inference of Patterns in Nature"|
|"Dots for Dummies"|
|"Sharpening our Focus on Dark Energy with Baryon Acoustic Oscillations"
|"Untangling Entanglement: Entanglement and Subsystems, Entanglement beyond Subsystems, and All That"
|"Nanostructures for Single-Molecule Biophysics"|
|"Spin Filtering and Interface Driven Spin Tunneling"|
|"Bacterial growth laws: origins and consequences"|
||University of Chicago
|“Certainty and Uncertainty in Dark Matter Searches”|
|Arthur O. Williams Lecture: “The Path to Magnetic Fusion Energy” (video)|
|“The Second Copernican Revolution: Our Changing View of Our Place in the Universe”|
|"Black Holes- the Harmonic Oscillators of the 21st Century"|
|Special Lecture: "A Step Up to Self-Assembly" (video)|
|"Mechanical Resonators in the Quantum Regime"|
||University of Washington
|"Viscosity, the quark gluon plasma, and string theory"|
|"A Research-Based Approach to Transforming Upper-Division Physics Courses"|
|"Spin and Pseudo-Spin in Graphene"|
|"Why are neutrinos so light?"
||University of Wisconsin, Madison
|"High Temperature Superconductors: Where Are We Now?"|
|“Dark Matter is from Cygnus: In Search of a Wind of Dark Matter in the Milky Way”|
|9/27/10||Paul Frampton||University of North Carolina||Tan|
|"Did Time Begin? Will Time End? Maybe the Big Bang Never Occurred"|
|10/4/10||Ted Jacobson||University of Maryland||Volovich|
|“Black Hole Entropy and the Thermodynamics of Spacetime”|
||University of Kentucky
|“Spin-Orbit Interaction Rediscovered in Transition Metal Oxides”|
||University of Pittsburgh
|“Cosmology from Velocities”|
|”Can Simple Biophysical Principles Yield Complicated Biological Functions?”|
|"The Life Cycle of Matter in the Large Magellanic Cloud: Insights from Spitzer and Herschel"|
||Harvard/Center for Astrophysics
|”Stellar Archaeology: New Science with Old Starts”|
|”Quark Soup al dente: Applied String Theory”|
||Brown University, Department of Chemistry
|”Probing the Electronic and Atomic Structures of Nano-Clusters and Multiply Charged Anions”|
|“Perspectives for Discovering New Physics at the CERN Large Hadron Collider”|
|“Scandal in Physics: The Affair of Jan Hendrik Schön at Bell Labs”|
|“Anticipating New Data from the Energy Frontier”|
|“Probing the 1000 TeV Energy Scale: A Search for μ-N -> e-N with Sensitivity of 10-17"|
||University of Maryland
|“Astrophysical Indicators of the Nature of Dark Matter”|
|"DarkSide - Direct Dark Matter Search with Depleted Argon"|
|"Making sense of non-Hermitian Hamiltonians"|
|4/18/11||Lene Hau||Harvard University||Stein|
|“Quantum Control of Light and Matter – from the Macroscopic to the Nanoscale”|
|4/25/11||Jenny Hoffman||Harvard University||Ling|
|"The Competitive Landscape of High-Tc Superconductivity"|
|"Controlling the Quantum World"|
|"The Physics of Information Flow in Biological Networks"|
|9/21/09||Ina Sarvecic||University of Arizona||Tan|
|"Cosmic Neutrinos: a New Window to the Universe"|
|9/28/09||Zvonimir Dogic||Brandeis University||Tang|
|"Order through Disorder: Entropy Driven Phase Transition in Colloidal Systems"|
|10/5/09||Salman Habib||Los Alamos National Laboratory||Koushiappas|
|"The Dark Universe Challenge: Is Theory up to the Task?"|
|10/19/09||Scott Dodelson||Fermilab / University of Chicago||Koushiappas|
|"Quarks to the Cosmos and Einstein"|
|10/26/09||Robert Brandenberger||McGill University||Tan|
|"Testing String Theory with Cosmological Observations"|
|"Are We Descended From Heavy Neutrinos?"|
|"How Might a Fermi Surface Die?"|
|11/23/09||Robert Carey||Boston University||Heintz|
|"The MuLan Experiment - A New Measurement of the Fermi Constant"|
|11/30/09||Eva Andrei||Rutgers University||Kosterlitz|
|“Electronic Properties of Graphene”|
|“Entropy in Quantum Information Theory and Condensed Matter Physics”|
|“New Approaches to and Applications of Neutron Interferometry”|
|2/15/10||Joerg Schmalian||Iowa State University||Mitrovic|
|“Unconventional Pairing in the Iron Based Superconductors”|
|3/1/10||Amir Yacoby||Harvard University||Stein|
|“Spins and Charges in Low Dimensions”|
|3/8/10||Herald Hess||HHMI's Janelia Farm Research Campus||Valles|
|Arthur O. Williams Lecture: "Following the Physics from the Hydrogen Atom to Fly Brains"|
|3/15/10||Mark Tordden||University of Pennsylvania||Koushiappas|
|“Pushing Einstein’s Boundaries: Gravitational Approaches to the Challenges of Modern Cosmology”|
|3/22/10||Nathan Seiberg||Institute for Advanced Study||Spradlin|
|“Supersymmetry and Its Breaking”|
|4/5/10||Vinothan Manoharan||Harvard University||Stein|
|"The Physics and Geometry of Self-Assembly"|
|4/12/10||David Ceperley||University of Illinois||Maris|
|"Is Solid Helium Superfluid"|
|4/26/10||Greg Landsberg||Brown University||Heintz|
|"Unlocking the Mysteries of the Universe at the Large Hadron Collider"|
||University of Chicago
|“Something Old, Something New"|
|“The Casimir Force: Still Mysterious after 60 Years”|
|“Quantum Criticality and Black Holes”
|“Metamaterials: New developments in electricity and magnetism 140 years after Maxwell's equations”|
||University of Pittsburgh
|“A Theory Program to Exploit Weak Gravitational Lensing to Constrain Dark Energy”|
||University of Florida
|“First Glimpse at the LHC Data with the CMS Experiment”|
|“Next Generation Electronic Measurements of Biomolecules”|
|“The Least Luminous Galaxies”|
||Institute for Advanced Study, Princeton
|“A Theory of Dark Matter”
||Karyn Le Hur
|“Entanglement, Decoherence, and Quantum Computer in a World of Many Particles”|
|“Complex fluids in confined flows"|
|2009 Arthur O. Williams Lecture: "Energy, Environment, Security: Can We Have It All?"|
||Ohio State University
|"What is Inside of a Black Hole?"|
||University of Chicago, Urbana-Champaign
|"New States of Quantum Matter"|
|"The Quest towards a Scalable Qubit"
||Ohio State University
|"New Vistas in Astronomy Above 1 TeV (1.6 erg) per Particle"|
||University of Washington
|"Improving Student Learning in Physics: The Challenge of Identifying Effective Instructional Strategies"|
|"Advances and Puzzles in Quantum Chromodynamics"|
|"A New View of the High Energy Gamma-ray Sky with the Fermi Gamma-ray Space Telescope "|
||Brookhaven National Laboratory
|"Parity violation in super-dense matter at RHIC"|
|"Recent Results from the VERITAS Gamma-ray Observatory"