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IQIM Postdoctoral and Graduate Student Seminar

Friday, April 17, 2015
12:00pm to 1:15pm
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East Bridge 114
Entanglement detection by interfering quantum many-body twins
Rajibul Islam, Postdoctoral Fellow - Greiner Group, Rubidium Gas Microscopy, MIT-Harvard Center for Ultracold Atoms,

Abstract: Entanglement is at the heart of quantum many-body physics, and is theoretically used to characterize quantum phase transitions and topological order. Detecting entanglement in experimental systems, however, is hard as it often requires a full reconstruction of the density matrix or prior knowledge about the state itself. Instead, in our experiments with interacting bosonic ultra cold atoms we rely on the general property of a bipartite entangled state that ignoring information about (or tracing over) one subsystem introduces a classical mixture in the other. This results in an increased Renyi entanglement entropy that we directly measure by interfering two identically prepared copies of a few-body state. 

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at marciab@caltech.edu.