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Tuesday, March 4, 2014

PHYSICS COLLOQUIUM: Ultracold Disordered Quantum Gases

Description:
Disorder is the rule, rather than the exception, in nature. Despite this, we understand little about how disorder affects interacting quantum matter. Brian DeMarco, University of Illinois, will give an overview of our experiments using ultracold atom gases to probe paradigms of interacting disordered quantum particles. We introduce disorder to naturally clean atomic gases cooled to billionths of a degree above absolute zero using focused optical speckle. He will explain how we observe Anderson localization---a spectacular phenomenon in which interference prevents waves from propagating in a disordered medium---of quantum matter in three dimensions. He will also show how we combine speckle with an optical crystal to emulate a completely tunable and precisely characterized disordered quantum solid. In these optical lattice experiments, we realize disordered Hubbard models that we use to answer critical questions regarding how disorder impacts the properties of electronic solids. {Will appear in FYI on Mar 4, 2014
Start Time:
4:00 PM
End Time:
5:00 PM
Room:
1412
Common Location Name:
Physics
Web Address:
www.umdphysics.umd.edu/events/physicscolloquia.html
Other Contact Information:
Carole Cuaresma Kiger +1 301 405 5945 ccuaresm@umd.edu


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