期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 46, 期 16, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/46/16/165304
关键词
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资金
- Israel Science Foundation [346/11, 29/11]
- United States-Israel Binational Science Foundation (BSF)
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.
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