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 language | English |
---|---|
Article number | 165304 |
Journal | Journal of Physics A: Mathematical and Theoretical |
Volume | 46 |
Issue number | 16 |
DOIs | |
State | Published - 26 Apr 2013 |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Statistics and Probability
- Modeling and Simulation
- Mathematical Physics
- Physics and Astronomy (all)