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Does an isolated many body quantum system relax?

时间:2014-06-13 作者: 来源:



Does an isolated many body quantum system relax?


报告人: Prof. Dr. Jörg Schmiedmayer

Vienna Center for Quantum Science and Technology (VCQ)
Institute of Atomic and Subatomic Physics
Vienna University of Technology,Austria

地点: 北京大学 理科2号楼2736报告厅

时间: 2014613日(星期五),下午 16:00-17:00


Understanding relaxation processes is an important unsolved problem in many areas of physics. A key challenge is the scarcity of experimental tools for the characterization of complex transient states. We used measurements of full quantum mechanical probability distributions of matter-wave interference to study the relaxation dynamics of a coherently split one-dimensional Bose gas and obtained comprehensive information about the dynamical states of the system. After an initial rapid evolution, the full distributions reveal the approach toward a thermal-like steady state characterized by an effective temperature that is independent from the initial equilibrium temperature of the system before the splitting process. We conjecture that this state can be described through a generalized Gibbs ensemble and associate it with prethermalization. 


Prof. Jörg Schmiedmayer received his PhD in Experimental physics in 1987 from TU-Wien (first  honours), 1990 – 1991, he was a postdoc at Harvard University, Cambridge MA U.S.A., 1992 –  1995, he was a postdoc+visiting scientist at MIT, Cambridge MA U.S.A., 1993 – 1997, he was an  assistent, Institut f. Experimentalphysik, Univ. Innsbruck, 1997 – 2000, he was associate professor  (with tenure) at Universität Innsbruck, 2000 – 2006, he was a full professor and Chair of  Experimental Physics, Physikalisches Institut, Universität Heidelberg, 2003 – 2006, he was also a  guest professor Peking University, Beijing, China, since 2006, he has been full professor and Chair of  Experimental Physics, Atomistitut der Österreichischen, Universitäten, TU-Wien, Austria.