The dynamics of coherence between coupled and decoupled one-dimensional quasicondensates

Details The dynamics of coherence between coupled and decoupled one-dimensional quasicondensates The dynamics of coherence between coupled and decoupled one-dimensional quasicondensates

2009-08-20

arxiv.org/abs/0908.2930v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

We reproduce the sub-exponential decoherence of one-dimensional quasicondensates observed in recent experiments. Counter-intuitively, the quasicondensates may decohere even when stongly coupled, if the temperature is large enough or the peak density is low enough to allow significant density fluctuations. We also propose an experiment to investigate the growth of coherence between two initially incoherent quasicondensates. We predict that the coherence will rise on a much slower timescale, and the final coherence again depends strongly on the density fluctuations.

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