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arXiv · 1204.3242

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

Christine Khripkov·Doron Cohen·Amichay Vardi
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Abstract

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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Christine Khripkov, Doron Cohen, Amichay Vardi. 2012-04-15. Temporal fluctuations in the bosonic Josephson junction as a probe for phase space tomography. https://doi.org/10.1088/1751-8113/46/16/165304

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