Differences between Mean-Field Dynamics and N-Particle Quantum Dynamics as a Signature of Entanglement

Journal Article · Fri Apr 11 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.140408· OSTI ID:21123845

Weiss, Christoph ^[1]; Teichmann, Niklas ^[2]

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1. Laboratoire Kastler Brossel, Ecole Normale Superieure, Universite Pierre et Marie-Curie-Paris 6, 24 rue Lhomond, CNRS, F-75231 Paris Cedex 05 (France)
2. Institut Henri Poincare, Centre Emile Borel, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 (France)

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.

• OSTI ID: 21123845
• Journal Information: Physical Review Letters, Vol. 100, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.100.140408; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
CHAOS THEORY
MEAN-FIELD THEORY
PERIODICITY
POTENTIALS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS