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Mean spin direction and spin squeezing in superpositions of spin coherent states |
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| Authors: | Dong Yan Xiaoguang Wang Lijun Song Zhanguo Zong |
| Institution: | (1) Institute of Applied Physics, Changchun University, Changchun, 130022, P.R. China;(2) Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, HangZhou, 310027, P.R. China;(3) School of Science, Lanzhou University of Technology, Lanzhou, 730050, P. R. China;(4) School of Science, Changchun University of Science and Technology, Changchun, 130022, P.R. China |
| 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. |
| Keywords: | spin squeezing mean spin direction |
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