Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 37: Matter At Low Temperature: Quantum Liquids, Bose-Einstein Condensates, Ultra-cold Atoms, ... 2

TT 37.4: Talk

Thursday, March 29, 2012, 10:15–10:30, H 3005

Floquet states of many-body quantum systems — •Sergey Denisov, Armin Seibert, Alexey Vladimir Ponomarev, and Peter Hänggi — Institut für Physik, Universität Augsburg, Universitätsstr. 1, D-86135 Augsburg

Periodic driving of a quantum many-body system could provide an access to a multitude of new-non-equilibrium states, essentially different from those a system exhibits at equilibrium. However, the field of ac-driven many-body quantum systems is a little-explored area, mainly for two reasons. First, until recently there were enough exciting problems to study at the equilibrium corner. Second, even under equilibrium conditions, a typical many-body system is a hard nut to crack due to the exponential growth of the number of system states with the number of quantum entities it contains. We discuss the possible directions to take in order to get insight into the evolution of ac-driven many-body quantum systems, outline the obstacles and possible means to overcome them. Our approach is based on the Floquet operator formalism and density-matrix renormalization group (DMRG) methods.