Temporal fluctuations in the bosonic Josephson junction as a probe for phase space tomography

Details Temporal fluctuations in the bosonic Josephson junction as a probe for phase space tomography Temporal fluctuations in the bosonic Josephson junction as a probe for phase space tomography

2012-04-15

arxiv.org/abs/1204.3242v1

Physics

Condensed Matter

Quantum Gases

5 pages, 5 figures

Scientific paper

We study the long time coherence dynamics of a two-mode Bose-Hubbard model in the Josephson interaction regime, as a function of the relative phase and occupation imbalance of an arbitrary coherent preparation. We find that the variance of the long time fluctuations of the one-body coherence can be factorized as a product of the inverse participation number 1/M that depends only on the preparation, and a semi-classical function C(E) that reflects the phase space characteristics of the pertinent observable. Temporal fluctuations can thus be used as a sensitive probe for phase space tomography of quantum many-body states.

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