Storage of spin squeezing in a two-component Bose-Einstein condensate

Abstract

Efficient control of spin squeezing in a two-component Bose-Einstein Condensate is studied by rapidly turning-off the external field at a time that maximal spin squeezing appears. We show that strong reduction of spin fluctuation can be maintained in a nearly fixed direction for a long time. We explain the underlying physics unambiguously, and present analytical expressions of the maximal-squeezing time.

10 pages, 5 figures. This version is slightly different from the one published in Phys. Rev. Lett

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