2012/04/30 by Christine Khripkov, Doron Cohen, Amichay Vardi · 2 citations
Computer Science · Physics and Astronomy · #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Function (biology) #Josephson effect #Parameter space #Phase (matter) #Phase space #Physics of Superconductivity and Magnetism #Quantum #Quantum Information and Cryptography #Quantum tomography #Relative phase #cond-mat.quant-gas
paper · pdf · doi:10.1088/1751-8113/46/16/165304
published as J. Phys. A: Math. Theor. 46, 165304 (2013) · 5 pages, 5 figures
openalex publication_date 2013/04/09 · arxiv created 2013/04/10 · arxiv updated 2015/06/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.