Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.61: Poster

Donnerstag, 9. März 2017, 17:00–19:00, P OG2

Master equations for disordered quantum systems — •Chahan Kropf and Andreas Buchleitner — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, D-79104, Freiburg, Deutschland

Recent experimental implementations of finite-size disordered systems with cold atoms or photonic circuits allow to study the dynamics of the state obtained by averaging over all realizations of the disorder, on transient time scales, and/or far from the thermodynamic limit. In [1], we showed that, in these regimes, the effective decoherence arising from the ensemble averaging procedure can be efficiently characterized in terms of generalized master equations.

Here we show that, using perturbation theory, which is needed to diagonalize the Hamiltonians of the single realizations of the disorder prior to the ensemble average, we can now describe a wide range of systems such as disordered lattice (Anderson-like) models, disordered transport networks or disordered Bose-Hubbard models.

[1] C. Kropf, C. Gneiting, and A. Buchleitner, Phys. Rev. X 6, 031032 (2016)