Tunnelling of condensate magnetization in a double-well potential

Details Tunnelling of condensate magnetization in a double-well potential Tunnelling of condensate magnetization in a double-well potential

2005-01-27

arxiv.org/abs/quant-ph/0501165v1

Physics

Quantum Physics

5 pages, 5 figures, submitted to Physical Review A

Scientific paper

10.1103/PhysRevA.71.053616

We study quantum dynamical properties of a spin-1 atomic Bose-Einstein condensate in a double-well potential. Adopting a mean field theory and single spatial mode approximation, we characterize our model system as two coupled spins. For certain initial states, we find full magnetization oscillations between wells not accompanied by mass (or atom numbers) exchange. We identify dynamic regimes of collective spin variables arising from nonlinear self-interactions that are different from the usual Josephson oscillations. We also discuss magnetization beats and incomplete oscillations of collective spin variables other than the magnetization. Our study points to an alternative approach to observe coherent tunnelling of a condensate through a (spatial) potential barrier.

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