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This Week at Physics

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Events on Friday, December 6th, 2013

Theory Seminar (High Energy/Cosmology)
CANCELLED - TO BE RESCHEDULED
Title to be announced
Time: 2:00 pm
Place: 5280 Chamberlin Hall
Speaker: Devin Walker, SLAC
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Theory Seminar (High Energy/Cosmology)
The dark 3+1+1 model
Time: 2:00 pm
Place: 5280 Chamberlin Hall
Speaker: Jinrui Huang, Los Alamos National Lab
Abstract: The existence of light sterile neutrinos in the eV mass range with relatively large mixing angles with the active neutrinos has been proposed for a variety of reasons, including to improve the fit to the LSND and MiniBooNE neutrino oscillation experiments, and reactor disappearance experiments. It was shown that neutrino mixing with a heavier sterile neutrino, in the mass range between 33 eV and several GeV, could significantly affect and improve the agreement between neutrino oscillation models with light sterile neutrinos and short baseline experimental results, allowing for a new source of CP violation in appearance experiments and for different apparent mixing angles in appearance and disappearance experiments. However various collider experiment, supernovae, and cosmological constraints can eliminate most of the parameter region where such a heavy sterile neutrino can have a significant effect on neutrino oscillations. I will present a model allowing a new light scalar in the MeV mass region, which is a potential dark matter candidate, to interact with the sterile neutrinos. The model can satisfy all experimental constraints and is a consistent theory of neutrino oscillation anomalies and dark matter which can also potentially explain the INTEGRAL excess of 511 keV gamma rays in the central region of the galaxy.
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Physics Department Colloquium
New Frontiers of Quantum Simulations with Atoms and Ions
Time: 3:30 pm
Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
Speaker: Prof. Dr. Peter Zoller, Institut für Theoretische Physik, Universität Innsbruck, University of Innsbruck
Abstract: Recently, the condensed matter and atomic physics communities have mutually benefited from synergies emerging from the quantum simulation of strongly correlated systems using atomic setups. In the first part of the talk we give an overview of analog and digital quantum simulation with cold atoms in optical lattices and trapped ions. In the second part we discuss possible future directions: while there is presently significant interest in artificial gauge fields mimicking magnetic fields in (neutral) atom setups to observe phenomena like fractional quantum Hall physics, we will discuss prospects of realizing simple models of dynamical gauge fields (lattice gauge theories) as a next generation of possible cold atom experiments, where the (very long term) vision is to perform quantum simulation of lattice gauge theories of QED and QCD.
Host: Mark Saffman
Poster: http://www.physics.wisc.edu/twap/posters/2013/2821.pdf
Video: http://www.physics.wisc.edu/vod/2013/12/06.html
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