Special CMS, Fiona Burnell Building fractional topological insulators

Fri, Sep 30, 2011, 1:30 pm – 6:00 pm

Abstract: Time-reversal invariant band insulators can be separated into two categories: `ordinary' insulators and `topological' insulators. Topological band insulators have low-energy edge modes that cannot be gapped without violating time-reversal symmetry, while ordinary insulators do not. A natural question is whether more exotic time-…

Physics Colloquium: Cheng Chin

Thu, Sep 29, 2011, 4:30 pm – 6:00 pm

“Observation of Scale Invariance and Quantum Criticality of Ultracold Atoms in Optical Lattices

Statistical Mechanics Seminar - Philip W. Anderson, Some new results on the ground state of the strong coupling (solid)limit of the Bose-Hubbard Mod

Wed, Sep 28, 2011, 2:00 pm – 3:30 pm

Abstract: The Mott insulator is accepted as the appropriate ground manifold for the strongly interacting Fermion Hubbard model, with solid
He-3 as the simplest exemplar. It is a manifold because of the spin degrees of freedom, which order antiferromagneticallly due to atom exchange, below a critical temperature. No corresponding effect…

High Energy Physcis Seminar- Sanjay Padhi, CERN -"Is SUSY still alive? A CMS perspective"

Tue, Sep 27, 2011, 2:00 pm – 3:00 pm

After decades of preparation, the experiments at the Large Hadron Collider (LHC)
are taking the first steps toward resolving many long-standing puzzles about fundamental
physics at the weak scale. There were high expectations for early discovery of Supersymmetry (SUSY) at
the beginning of the LHC search program. This talk summarizes the…

High Energy Theory Seminar - David Skinner, Perimeter Institute - Scattering Amplitudes and Wilson Loops in Twistor Space

Mon, Sep 26, 2011, 2:30 pm – 4:00 pm

Over the past few years, a remarkable duality between planar scattering amplitudes and null polygonal Wilson Loops has emerged in maximally supersymmetric Yang-Mills theory. The duality is now known to hold for arbitrary external helicities and to all orders in the 't Hooft coupling. I will review our understanding of this duality from the point…

High Energy Theory Seminar - Andreas Schmitt, Vienna University of Technology - "Inverse Magnetic Catalysis in Dense Holographic Matter"

Fri, Sep 23, 2011, 1:30 pm – 3:00 pm

Abstract: I will discuss the chiral phase transition in a magnetic field at finite temperature and chemical potential within the Sakai-Sugimoto model, a holographic top-down approach to (large-N_c) QCD. For small temperatures the addition of a magnetic field decreases the critical chemical potential for chiral symmetry restoration. This is in…

Princeton University Gravity Group Astrophysics/Cosmology Lunch Special Seminar

Fri, Sep 23, 2011, 12:00 pm – 1:30 pm

Inaugural Math-Physics GR Seminar
Speaker: Mihalis Dafermos, University of Cambridge
“The mathematical approach to general relativity"

***Lunch will be provided***

***Lunch will be provided***

Physics Colloquium: Jason Petta

Thu, Sep 22, 2011, 4:30 pm – 6:00 pm

“Strong-Arming Electron Spin Dynamics

Holographic Fermi Surfaces: The view from the top down - Julian Sonner

Tue, Sep 20, 2011, 12:30 pm – 2:00 pm

Strongly interacting fermions at finite density are infamously hard to treat. Gauge/gravity duality gives a way of studying them in a controlled environment. For such studies to be reliable it is important that the models are eventually embedded in M-theory (or string theory). In this talk I will describe how to look for some of the most basic…

High Energy Theory Seminar “On the Classification of Massive Phases of Gauge Theories

Mon, Sep 19, 2011, 2:30 pm – 4:00 pm

High Energy Theory Seminar “Flux Tubes, Integrability and the S-matrix of N=4 SYM

Fri, Sep 16, 2011, 1:30 pm – 3:00 pm

The Cosmic Ray Climate Connection - From Geological time scales to the 20th Century - Prof. Nir Shaviv - Racah Institute of Physics

Mon, Aug 8, 2011, 11:00 am – 1:00 pm

Abstract: Cosmic Rays affect the climate though changes in the atmospheric ionization. This emerging theory is supported by evidence which has been accumulating over the past decade or so. We will review this evidence, ranging from climate variations associated with cosmic ray flux variations over multi-million year time scale (and which are the…

Special CMS Dr. Hugo Dil, Paul Sherrer Inst. "Spin texture manipulation in systems with large spin-obit interaction."

Thu, Jul 28, 2011, 2:00 pm – 6:00 pm

Abstract: The COPHEE end station at the Swiss Light Source can provide the three spatial components of the expectation value of the spin polarization. Combined with our vectorial analysis method this allows us to determine the spin polarization vector for any region in momentum space. After an introduction to this technique I will demonstrate its…

Condensed Matter Seminar

Mon, Jul 18, 2011, 1:30 pm – 6:30 pm

Abstract: The fundamental collective degree of freedom of fractional quantum Hall states is identified as a unimodular two-dimensional spatial metric that characterizes the local shape of the correlations of the incompressible fluid. Its quantum fluctuations are controlled by a topologically-quantizedâguiding-center spinâ

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