Relationship between spin squeezing and single-particle coherence in two-component Bose-Einstein condensates with Josephson coupling
Relationship between spin squeezing and single-particle coherence in two-component Bose-Einstein condensates with Josephson coupling
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约瑟夫森耦合双组分玻色-爱因斯坦凝聚体中自旋挤压与单粒子相干性的关系
DOI：
10.1103/physreva.78.063620
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发表时间：
2008-08
期刊：
影响因子：
--
通讯作者：
金光日
中科院分区：
文献类型：
--
作者：
金光日
We investigate spin squeezing of a two-mode boson system with a Josephson coupling. An exact relation between the squeezing and the single-particle coherence at the maximal-squeezing time is discovered, which provides a more direct way to measure the squeezing by readout of the coherence in atomic interference experiments. We prove explicitly that the strongest squeezing is along the ${J}_{z}$ axis, indicating the appearance of an atom number-squeezed state. Power laws of the strongest squeezing and the optimal coupling with particle number $N$ are obtained based upon a wide range of numerical simulations.
