Thermal vs quantum decoherence in double well trapped Bose-Einstein condensates

Details Thermal vs quantum decoherence in double well trapped Bose-Einstein condensates Thermal vs quantum decoherence in double well trapped Bose-Einstein condensates

2001-04-24

arxiv.org/abs/cond-mat/0104458v1

Physics

Condensed Matter

4 pages, 2 postscript figures

Scientific paper

10.1103/PhysRevLett.87.180402

The quantum and thermal fluctuations of the phase are investigated in a cold Bose gas confined by a double well trap. The coherence of the system is discussed in terms of the visibility of interference fringes in both momentum and coordinate space. The visibility is calculated at zero as well as at finite temperature. The thermal fluctuations are shown to affect significantly the transition from the coherent to the incoherent regime even at very low temperatures. The coherence of an array of multiple condensates is also discussed.

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