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2007 | 5 | 3 | 367-376

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Mean spin direction and spin squeezing in superpositions of spin coherent states


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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.


  • Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, HangZhou, 310027, P.R. China
  • Institute of Applied Physics, Changchun University, Changchun, 130022, P.R. China


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