Phase Coherence in a Driven Double-Well System

Details Phase Coherence in a Driven Double-Well System Phase Coherence in a Driven Double-Well System

2004-04-13

arxiv.org/abs/cond-mat/0404308v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 2 figures

Scientific paper

10.1103/PhysRevA.70.053622

We analyze the dynamics of the molecular field incoherently pumped by the photoassociation of fermionic atoms and coupled by quantum tunnelling in a double-well potential. The relative phase distribution of the molecular modes in each well and their phase coherence are shown to build up owing to quantum mechanical fluctuations starting from the vacuum state. We identify three qualitatively different steady-state phase distributions, depending on the ratio of the molecule-molecule interaction strength to interwell tunnelling, and examine the crossover from a phase-coherent regime to a phase-incoherent regime as this ratio increases.

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