Differences between mean-field dynamics and N-particle quantum dynamics as a signature of entanglement

Details Differences between mean-field dynamics and N-particle quantum dynamics as a signature of entanglement Differences between mean-field dynamics and N-particle quantum dynamics as a signature of entanglement

2008-05-05

arxiv.org/abs/0805.0531v1

Physical Review Letters 100 (2008) 140408

Physics

Condensed Matter

Other Condensed Matter

four pages, five figures

Scientific paper

10.1103/PhysRevLett.100.140408

A Bose-Einstein condensate in a tilted double-well potential under the influence of time-periodic potential differences is investigated in the regime where the mean-field (Gross-Pitaevskii) dynamics become chaotic. For some parameters near stable regions, even averaging over several condensate oscillations does not remove the differences between mean-field and N-particle results. While introducing decoherence via piecewise deterministic processes reduces those differences, they are due to the emergence of mesoscopic entangled states in the chaotic regime.

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