Many-particle tunnelling in a driven Bosonic Josephson junction

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Author(s): Tharanga Jinasundera, Christoph Weiss, Martin Holthaus
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Article: Chemical Physics 322, 118-126 (2006), Elsevier
Keywords: Bose–Einstein condensation; Tunnelling effect; Many-body dynamics; Quantum Floquet theory
PACS: 03.75.Lm, 05.45.Mt
Abstract:: We study the quantum many-body dynamics of a Bose–Einstein condensate in a double well potential subjected to a time-periodic modulation. For modulation frequencies moderately higher than the single-particle tunnelling frequency, this system displays an interplay of self-trapping and coherent tunnelling destruction, allowing one to effectively shut off the tunnelling contact in extended parameter regimes. For modulation frequencies roughly equalling the tunnelling frequency, one encounters chaotic dynamics, and finds sudden population jumps in the regime of low-frequency driving. A driven Bosonic Josephson junction thus constitutes a promising tool for the coherent control of mesoscopic matter waves. Our predictions can be verified under presently accessible experimental conditions.
Copyright: Elsevier
DOI: 10.1016/j.chemphys.2005.06.025