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： 2014年6月13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.