Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 9: CE: (General) Theory 1

TT 9.12: Talk

Monday, March 14, 2011, 17:15–17:30, HSZ 201

The Crooks relation in optical spectra - universality in work distributions for weak local quenches — •Markus Heyl and Stefan Kehrein — Department of Physics, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 Munich, Germany

We show that work distributions and non-equilibrium work fluctuation theorems can be measured in optical spectra for a wide class of quantum systems. We consider systems where the absorption or emission of a photon corresponds to the sudden switch on or off of a local perturbation. For the particular case of a weak local perturbation, the Crooks relation establishes a universal relation in absorption as well as in emission spectra. Due to a direct relation between the spectra and work distribution functions this is equivalent to universal relations in work distributions for weak local quenches. As two concrete examples we treat the X-ray edge problem and the Kondo exciton [1].
M. Heyl and S. Kehrein, arXiv:1006.3522