Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Correlated Electrons: Low-Dimensional Systems - Models 3

TT 25.11: Vortrag

Dienstag, 12. März 2013, 12:30–12:45, H9

The eigenstate thermalization hypothesis near integrable points — •Wouter Beugeling, Masud Haque, and Roderich Moessner — Max Planck Institute for the Physics of Complex Systems (MPI-PKS), Dresden, Germany

In the field of nonequilibrium quantum dynamics, the issue of thermalization in isolated systems has been the topic of intense recent interest. The eigenstate thermalization hypothesis (ETH) has been proposed as a mechanism for the thermalization of nonintegrable systems. According to the ETH, the expectation values of typical physical observables in eigenstates vary smoothly as a function of the corresponding eigenenergies.

We discuss systems that can be tuned towards and away from integrability by the variation of parameters in the Hamiltonian. We present results on whether and how the ETH progressively breaks down as we approach an integrable point. We also address the role played by the choice of physical observable.