Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Many-body Quantum Dynamics

DY 29.11: Vortrag

Mittwoch, 3. April 2019, 12:30–12:45, H19

Non-equilibrium Fluctuation theorems for strongly-coupled, non-thermal environments — •Javier Cerrillo — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr 36 10623 Berlin

We propose a novel form of symmetry for the derivation of fluctuation theorems that only requires the assumption of an initial local thermal state of the subsystem of interest. Therefore, they do not rely on the usual concepts of microscopic time-reversibility and global thermal state involving the environment. Moreover, these theorems apply regardless of the Markovianity of the subsystem or of the strength of its coupling to the environment. In the context of laser cooling of trapped ions, experimentally confirmed deviations from weak-coupling thermalization can be treated with this perspective. These deviations are often detrimental for the thermodynamic function as we have shown with help of Floquet-Markov-based simulation methods, due to the appearance of polaronic, correlated dynamics between the subsystem and its environment.