Events Archive

2014

Condensed Matter Seminar, Cheng Chin, U of Chicago,“Ferromagnetic domains and roton excitations in a dilute Bose superfluid”

Mon, Nov 24, 2014, 1:15 pm to 2:30 pm
We present a new scheme to engineer the energy-momentum dispersion of atoms in optical lattices. By hybridizing bands, we identify a novel quantum phase transition from the emergence of superfluid domains with ferromagnetic interactions.

Particle Physics Seminar, Yoni Kahn, MIT, "Halo-independent methods for emerging dark matter signals"

Fri, Nov 21, 2014, 4:00 pm to 5:00 pm
The increasingly constraining null results of the LUX, XENON, and CDMS direct-detection experiments suggest that any future dark matter signal will begin with a trickle of events, rather than a flood.

High Energy Theory Seminar- Julian Sonner, MIT - "Exact Results for (super-) Entanglement and Renyi Entropies, and their Gravity Duals"

Fri, Nov 21, 2014, 1:45 pm to 2:30 pm

The recent focus on entanglement entropy in holography has many motivations, ranging from the applied (e.g. AdS/CMT) to the foundational (emergence of gravity).

Hamilton Colloquium Series - E.K.U. Gross, Max-Planck Institute of Microstructure Physics, Germany. (Please see title below.)

Thu, Nov 20, 2014, 4:30 pm to 6:00 pm

"How to make the Born-Oppenheimer approximation exact: A fresh look at potential energy surfaces and Berry phases in the vicinity of strong non-adiabatic couplings" The Born-Oppenheimer approximation is among the most fundamental ingredients of modern condensed matter physics.

Informal HET Seminar - IAS - Thibault Damour, Institut des Hautes Etudes Scientifiques, Bures sur Yvette, France

Thu, Nov 20, 2014, 1:00 pm to 2:30 pm
Title: “Hidden Hyperbolic Kac-Moody Structures in Supergravity and a Possible Quantum Avoidance of Cosmological Singularities” We shall review the evidence for a duality between 11-dimensional supergravity (and hopefully M-theory) and the dynamics of a spinning massless particle on the

Special Condensed Matter Seminar, Adolpho Grushin, Max Planck,"Stability of Chern and Fractional Chern insulators"

Wed, Nov 19, 2014, 2:00 pm to 3:00 pm
Chern insulators (CI) and fractional Chern insulators (FCI) are zero field lattice analogues of the integer and fractional quantum Hall effects respectively. In this talk we will address the important problem of when and how they are induced by interactions.

Math Physics Seminar, Jakob Yngvason, U. of Vienna, "Superfluid behavior of a Bose-Einstein condensate in a random potential"

Tue, Nov 18, 2014, 4:30 pm to 5:30 pm
We investigate the relation between Bose-Einstein condensation

High Energy Theory Seminar- Itmar Shamir, Weizmann Institute - "On Supersymmetry and Boundaries"

Tue, Nov 18, 2014, 2:00 pm to 3:00 pm
We consider N=1 supersymmetric theories on 4d spaces with boundaries. The variation of the Lagrangian under supersymmetry is a total derivative, which presents an obstruction to preserving supersymmetry on spaces with boundaries. Such total derivative terms can be canceled by boundary actions without specifying boundary conditions.

High Energy Theory Seminar- Jennifer Lin U. of Chicago, "Tomography from Entanglement"

Mon, Nov 17, 2014, 2:30 pm to 3:30 pm
The Ryu-Takayanagi formula relates the entanglement entropy in a conformal field theory to the area of a minimal surface in its holographic dual. I will show that this relation can be inverted to reconstruct the bulk stress-energy tensor near the boundary of the bulk spacetime, from the entanglement on the boundary.

Condensed Matter Seminar, Anatoli Polkovnikov, Boston U., "Emergent non-adiabatic dynamics and geometric response in interacting systems"

Mon, Nov 17, 2014, 1:15 pm to 2:30 pm
I will overview relations between the non-adiabatic response and the geometric tensor. In particular, I will show how the Berry curvature (imaginary part of the geometric tensor) and the topological phase transitions can be engineered and measured using non-adiabatic response and discuss recent experiments in superconducting qubits.

Particle Physics Seminar, James Barnard, Melbourne, Composite Higgs models with “the works”

Fri, Nov 14, 2014, 4:00 pm to 5:00 pm
Several methods exist for realising dark matter and gauge coupling unification in composite Higgs models. I will give an overview of the most popular ideas, and show how they can be incorporated into complete, stand-alone models.

Hamilton Colloquium Series - Eva Halkiadakis, Rutgers University, "Searching for Supersymmetry with CMS Experiement at the LHC"

Thu, Nov 13, 2014, 4:30 pm to 6:00 pm

The Large Hadron Collider (LHC) has had a successful Run I. It provided the highest energy proton collisions to-date to the experiments, at a center-of-mass energy of 8 TeV. In 2012, the observation of a new Higgs-like boson was announced to the world. There is also an extensive program at the LHC to search for physics beyond the Standard Model...

Special Condensed Matter Seminar, Debaleena Nandi, Caltech, "Signatures of bulk exciton transport in Coulomb drag and tunneling"

Thu, Nov 13, 2014, 11:00 am to 12:00 pm
Bose-Einstein condensation of excitons is realized in a quantum Hall bilayer at vT=1 when the total electron density in the two quantum wells matches the degeneracy of a single spin split Landau level.

Math Physics Seminar, Christian Fronsdal, UCLA, "The Structure of flow in Hyrdrodynamics, Thermodynamics and General Relativity, from Navier Stokes

Tue, Nov 11, 2014, 4:30 pm to 5:30 pm
"The structure of flow in Hydrodynam:wqics, Thermodynamics and General Relativity, from Navier Stokes to Tolman."

Special Condensed Matter Seminar, Barry Bradlyn, Yale, "Viscous and Thermal Transport in Topological Phases"

Tue, Nov 11, 2014, 2:00 pm to 3:00 pm
One hallmark of topological phases with broken time reversal symmetry is the appearance of quantized non-dissipative transport coefficients, the archetypical example being the quantized Hall conductivity in quantum Hall states.

High Energy Theory Seminar- Peter Koroteev, Perimeter Institute - "Gauge Theories with Defects and Quantum Geometry"

Mon, Nov 10, 2014, 2:30 pm to 4:00 pm
We study various protected quantities in five dimensional gauge theories on $\mathbb{R}^4\times S^1$ with eight supercharges in the presence of defects.

Condensed Matter Seminar, John Martinis, UCSB, "Superconducting qubits poised for fault-tolerant quantum computation"

Mon, Nov 10, 2014, 1:15 pm to 2:30 pm
Superconducting quantum computing is now at an important crossroad, where “proof of concept” experiments involving small numbers of qubits can be transitioned to more challenging and systematic approaches that could actually lead to building a quantum computer.