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

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

2008-09-10

arxiv.org/abs/0809.1776v1

Phys. Rev. Lett. 101, 200402 (2008)

Physics

Condensed Matter

Other Condensed Matter

10 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.101.200402

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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