Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 7: Dynamics in many-body systems: Equilibration and localization I (joint session DY/TT)

TT 7.6: Vortrag

Montag, 1. April 2019, 11:15–11:30, H19

Decoherence Entails Exponential Forgetting in Systems Complying with the Eigenstate Thermalization Hypothesis — •Lars Knipschild and Jochen Gemmer — University of Osnabrück, D-49069 Osnabrück, Germany

According to the eigenstate thermalization ansatz, matrices representing generic few-body observables exhibit a specific form when displayed regarding the eigenbasis of the Hamiltonian. We examine the effect of environmental induced decoherence on the expectation value dynamics of observables confirming with said eigenstate thermalization ansatz. We find that this influence is equivalent to an exponential damping of the memory-kernel appearing in an equation of motion for the expectation value. The statement is formulated as a rigorous theorem.