Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 58: Characterization and control of complex quantum systems SYQS 3 (with Q, MO, MS, MP, AGjDPG)

A 58.3: Vortrag

Freitag, 21. März 2014, 17:00–17:15, Audimax

On the versatility of quantum master equations: an effective description of disorder dynamics — •Chahan M. Kropf, Clemens Gneiting, and Andreas Buchleitner — Institute of Physics, Albert-Ludwigs University of Freiburg, Hermann-Herder-Str.3, D-79104 Freiburg, Germany

In order to describe the dynamics of quantum systems subject to disorder, one typically computes the ensemble average either with a perturbative approach or by direct numerical simulation. Another possibility consists in an effective description of the ensemble-averaged dynamics.

Here we propose to derive general, local-in-time, quantum master equations for the ensemble-averaged dynamics of finite, isolated, disordered quantum systems. To do so, we first invert the exact dynamics for single realizations, and then perform the ensemble averaging explicitly. Under rather general conditions do we find Non-Markovian dynamics and master equations with time-dependent decay rates and Hermitian Lindblad operators.