2010/06/30 by Markus Heyl, Stefan Kehrein · 3 citations
Neuroscience · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Exciton #Neural dynamics and brain function #Non-equilibrium thermodynamics #Perturbation (astronomy) #Photon #Physics #Quantum many-body systems #Quantum mechanics #Spectral line #Statistical physics #Universality (dynamical systems) #Work (physics) #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.108.190601
published as Phys. Rev. Lett. 108, 190601 (2012) · 4+ pages, 1 figure; version as published
openalex publication_date 2012/05/07 · arxiv created 2012/07/09 · arxiv updated 2012/07/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that work distributions and nonequilibrium 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. Because of 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.