Spin Squeezing in 4-Qubit State Superposed by GHZ State, W State and Symmetric State

Author: Liu Desheng  

Publisher: Springer Publishing Company

ISSN: 0020-7748

Source: International Journal of Theoretical Physics, Vol.52, Iss.1, 2013-01, pp. : 62-68

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Abstract

We investigate the entangled property via spin squeezing in a 4-qubit state superposed by a GHZ state, W state and symmetric state with relative phases. Numerically solutions for spin squeezing parameter are derived. Mean spin direction and the spin squeezing parameters are determined by the superposition coefficients and the relative phases.