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arXiv · 1003.0217

Nonlinear phase-dynamics in a driven Bosonic Josephson junction

Erez Boukobza·Michael G. Moore·Doron Cohen·Amichay Vardi
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Abstract

We study the collective dynamics of a driven two mode Bose-Hubbard model in the Josephson interaction regime. The classical phase-space is mixed, with chaotic and regular components, that determine the dynamical nature of the fringe-visibility. For weak off-resonant drive, where the chaotic component is small, the many-body dynamics corresponds to that of a Kapitza pendulum, with the relative-phase $φ$ between the condensates playing the role of the pendulum angle. Using a master equation approach we show that the modulation of the inter-site potential barrier stabilizes the $φ=π$ 'inverted pendulum' coherent state, and protects the fringe visibility.

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Erez Boukobza, Michael G. Moore, Doron Cohen, Amichay Vardi. 2010-03-01. Nonlinear phase-dynamics in a driven Bosonic Josephson junction. https://doi.org/10.1103/physrevlett.104.240402

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