Dynamics and Berry phase of two-species Bose-Einstein condensates

Details Dynamics and Berry phase of two-species Bose-Einstein condensates Dynamics and Berry phase of two-species Bose-Einstein condensates

2004-03-23

arxiv.org/abs/cond-mat/0403570v1

Phys. Rev. A 69,023611(2004)

Physics

Condensed Matter

Soft Condensed Matter

18 pages,5 figures

Scientific paper

10.1103/PhysRevA.69.023611

In terms of exact solutions of the time-dependent Schrodinger equation for an effective giant spin modeled from a coupled two-mode Bose-Einstein condensate (BEC) with adiabatic and cyclic time-varying Raman coupling between two hyperfine states of the BEC, we obtain analytic time-evolution formulas of the population imbalance and relative phase between two components with various initial states, especially the SU(2)coherent state. We find the Berry phase depending on the number parity of atoms, and particle number dependence of the collapse revival of population-imbalance oscillation. It is shown that self-trapping and phase locking can be achieved from initial SU(2) coherent states with proper parameters.

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