Control of the geometric phase and pseudo-spin dynamics on coupled Bose-Einstein condensates

Details Control of the geometric phase and pseudo-spin dynamics on coupled Bose-Einstein condensates Control of the geometric phase and pseudo-spin dynamics on coupled Bose-Einstein condensates

2006-12-26

arxiv.org/abs/quant-ph/0612213v1

Physics

Quantum Physics

1 tex file and 11 figures in pdf format

Scientific paper

We describe the behavior of two coupled Bose-Einstein condensates in time-dependent (TD) trap potentials and TD Rabi (or tunneling) frequency, using the two-mode approach. Starting from Bloch states, we succeed to get analytical solutions for the TD Schroedinger equation and present a detailed analysis of the relative and geometric phases acquired by the wave function of the condensates, as well as their population imbalance. We also establish a connection between the geometric phases and constants of motion which characterize the dynamic of the system. Besides analyzing the affects of temporality on condensates that differs by hyperfine degrees of freedom (internal Josephson effect), we also do present a brief discussion of a one specie condensate in a double-well potential (external Josephson effect).

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