Exploiting soliton decay and phase fluctuations in atom chip interferometry of Bose-Einstein condensates

Details Exploiting soliton decay and phase fluctuations in atom chip interferometry of Bose-Einstein condensates Exploiting soliton decay and phase fluctuations in atom chip interferometry of Bose-Einstein condensates

2007-10-05

arxiv.org/abs/0710.1213v2

Phys. Rev. Lett. 100, 100402 (2008)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.100.100402

We show that the decay of a soliton into vortices provides a mechanism for measuring the initial phase difference between two merging Bose-Einstein condensates. At very low temperatures, the mechanism is resonant, operating only when the clouds start in anti-phase. But at higher temperatures, phase fluctuations trigger vortex production over a wide range of initial relative phase, as observed in recent experiments at MIT. Choosing the merge time to maximize the number of vortices created makes the interferometer highly sensitive to spatially varying phase patterns and hence atomic movement.

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