Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 83: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems I

TT 83.6: Vortrag

Donnerstag, 3. April 2014, 11:00–11:15, HSZ 03

Analysis of the work distribution function after a quench in the transverse field Ising model — •Nils Abeling and Stefan Kehrein — Department of Physics, Georg-August-Universität, Göttingen, Germany

Non-analytic behaviour of the Loschmidt echo in non-equilibrium quantum many-body systems indicates a breakdown of the short time expansion. The analytically calculated work distribution function in the thermodynamic limit was shown to display such non-analytic behaviour at T=0 in Ref. [1] indicating a dynamical phase transition. The result is generalized to non-zero temperature and a suggestive interpretation is given.
M. Heyl, A. Polkovnikov, and S. Kehrein, Phys. Rev. Lett. 110, 135704 (2013)