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Entangled Property in Cloned Superposition State

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Abstract

With spin squeezing and quantum Fisher information we investigate the entangled property of the cloned superposition state which is superposed by two states. We first derive the mean spin direction, the optimally squeezed angle and the anti-squeezed angle. Then we numerically calculate the dependence of spin squeezing parameter and the reciprocal of the mean quantum Fisher information on the superposed coefficients and the relative phase. Its shown that the entangled degree is determined by the superposed coefficients and the relative phase.

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  1. Jiangxi University of technology, Nanchang, 330098, People’s Republic of China

    Di-You Jiang

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  1. Di-You Jiang
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Correspondence to Di-You Jiang.

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Jiang, DY. Entangled Property in Cloned Superposition State. Int J Theor Phys 52, 4308–4312 (2013). https://doi.org/10.1007/s10773-013-1746-5

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  • DOI: https://doi.org/10.1007/s10773-013-1746-5

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