Jin Guang-Ri, Kim Sang Wook
Department of Physics Education and Department of Physics, Pusan National University, Busan 609-735, Korea.
Phys Rev Lett. 2007 Oct 26;99(17):170405. doi: 10.1103/PhysRevLett.99.170405. Epub 2007 Oct 25.
A simple scheme for storage of spin squeezing in a two-component Bose-Einstein condensate is investigated by considering rapidly turning-off the external field at a time that maximal spin squeezing occurs. We show that strong reduction of spin fluctuation can be maintained in a nearly fixed direction. We explain the underlying physics using the phase model and present analytical expressions of the maximal-squeezing time and the corresponding squeezing parameter.
通过考虑在最大自旋压缩发生的时刻迅速关闭外场，研究了一种在双组分玻色-爱因斯坦凝聚体中存储自旋压缩的简单方案。我们表明，自旋涨落的强烈减小可以在几乎固定的方向上得以维持。我们使用相位模型解释其 underlying physics，并给出最大压缩时间和相应压缩参数的解析表达式。
