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

Christine Khripkov, Doron Cohen, Amichay Vardi

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We study the long-time dynamics of the reduced one-particle Bloch vector S 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 S can be factorized as a product of the inverse participation number 1/M that depends only on the preparation, and a semiclassical 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.

Original languageEnglish
Article number165304
JournalJournal of Physics A: Mathematical and Theoretical
Volume46
Issue number16
DOIs
StatePublished - 26 Apr 2013

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