Mean spin direction and spin squeezing in superpositions of spin coherent states
Dong Yan, Xiaoguang Wang, Lijun Song, Zhanguo Zong · Open Physics · 2007
Abstract We consider the mean spin direction (MSD) of superpositions of two spin coherent states (SCS) | ± μ〉, and superpositions of | μ〉 and | μ*〉 with a relative phase. We find that the azimuthal angle exhibits a π transition for both states when we vary the relative phase. The spin squeezing of the states, and the bosonic counterpart of the mean spin direction are also discussed.