Two-Mode Theory of BEC Interferometry

Details Two-Mode Theory of BEC Interferometry Two-Mode Theory of BEC Interferometry

2006-01-03

arxiv.org/abs/quant-ph/0601012v2

J. Mod. Opt. 54, 615 (2007)

Physics

Quantum Physics

Four figures (7 files)

Scientific paper

A theory of BEC interferometry in an unsymmetrical double-well trap has been developed for small boson numbers, based on the two-mode approximation. The bosons are initially in the lowest mode of a single well trap, which is split into a double well and then recombined. Possible fragmentations into separate BEC states in each well during the splitting/recombination process are allowed for. The BEC is treated as a giant spin system, the fragmented states are eigenstates of S^2 and Sz. Self-consistent sets of equations for the amplitudes of the fragmented states and for the two single boson mode functions are obtained. The latter are coupled Gross-Pitaevskii equations. Interferometric effects may be measured via boson numbers in the first excited mode

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