nt - p h / 02 04 01 9 v 1 4 A pr 2 00 2 Squeezing of a coupled state of two spinors
نویسندگان
چکیده
The notion of spin squeezing involves reduction in the uncertainty of a component of the spin vector S below a certain limit. This aspect has been studied earlier [1, 2] for pure and mixed states of definite spin. In this paper, this study has been extended to coupled spin states which do not possess sharp spin value. A general squeezing criterion has been obtained by requiring that a direct product state for two spinors is not squeezed. The squeezing aspect of entangled states is studied in relation to their spin-spin correlations.
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Dong Ruan∗ Department of Physics, Tsinghua University, Beijing 100084, P. R. China, Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou, 730000, P. R. China The Key Laboratory of Quantum Information and Measurements of Ministry of Education, Tsinghua University, Beijing 100084, P. R. China, and Weicheng Huang Institute of Applied Chemistry, Xingjiang Uni...
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