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

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Author(s): Christoph Weiss, Niklas Teichmann
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Article: Physical Review Letters 100, 140408 (2008), APS
Keywords: Chaos, mesoscopic entanglement, Bose-Einstein condensation
PACS: 03.75.Gg, 05.45.Mt, 74.50.+r
Abstract:: 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.
Copyright: APS
URL: http://arxiv.org/abs/0805.0531 (text/plain)