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arXiv · 0809.1776

Dissipation induced coherence of a two-mode Bose-Einstein condensate

D. Witthaut·F. Trimborn·S. Wimberger
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Abstract

We discuss the dynamics of a Bose-Einstein condensate in a double-well trap subject to phase noise and particle loss. The phase coherence of a weakly-interacting condensate as well as the response to an external driving show a pronounced stochastic resonance effect: Both quantities become maximal for a finite value of the dissipation rate matching the intrinsic time scales of the system. Even stronger effects are observed when dissipation acts in concurrence with strong inter-particle interactions, restoring the purity of the condensate almost completely and increasing the phase coherence significantly.

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D. Witthaut, F. Trimborn, S. Wimberger. 2008-09-10. Dissipation induced coherence of a two-mode Bose-Einstein condensate. https://doi.org/10.1103/physrevlett.101.200402

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