Fragmented and Single Condensate Ground States of Spin-1 Bose Gas

Abstract

We show that the ground state of a spin-1 Bose gas with an antiferro- magnetic interaction is a fragmented condensate in uniform magnetic fields. The number fluctuations in each spin component change rapidly from being enormous (order $N$) to exceedingly small (order 1) as the magnetization of the system increases. A fragmented condensate can be turned into a single condensate state by magnetic field gradients. The conditions for existence and the method of detecting fragmented states are presented.

4 pages, no figures

References in corpus (1)

• Spin domains in ground state spinor Bose-Einstein condensates

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