Geometric phases of mesoscopic spin in Bose-Einstein condensates

Details Geometric phases of mesoscopic spin in Bose-Einstein condensates Geometric phases of mesoscopic spin in Bose-Einstein condensates

2001-08-16

arxiv.org/abs/quant-ph/0108078v2

Phys. Rev. A 66, 022102 (2002)

Physics

Quantum Physics

6 pages, 2 figures

Scientific paper

10.1103/PhysRevA.66.022102

We propose a possible scheme for generating spin-J geometric phases using a coupled two-mode Bose-Einstein condensate (BEC). First we show how to observe the standard Berry phase using Raman coupling between two hyperfine states of the BEC. We find that the presence of intrinsic interatomic collisions creates degeneracy in energy that allows implementation of the non-Abelian geometric phases as well. The evolutions produced can be used to produce interference between different atomic species with high numbers of atoms or to fine control the difference in atoms between the two species. Finally, we show that errors in the standard Berry phase due to elastic collisions may be corrected by controlling inelastic collisions between atoms.

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