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Spin Squeezing of 4-Qubit State

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Abstract

We investigate the spin squeezing of a 4-qubit state, which is superposed by a 4-qubit GHZ state and two W states with a relative phase. Numerically solution for spin squeezing parameter is given. It is shown that the parameter depends on the superposition coefficients and the relative phase. It is shown that spin squeezing exists over a relatively long time with increasing superposition coefficient γ and the smaller the value of relative phase is, the longer the time of existing spin squeezing.

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Acknowledgements

This work was supported by Youth Fund Project in the Education Department of Jiangxi Province Grant No: GJJ11258.

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Authors and Affiliations

  1. Department of New Energy Science and Engineering, Xinyu College, Xinyu, 338004, People’s Republic of China

    Run-Sheng Wu

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  1. Run-Sheng Wu
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Correspondence to Run-Sheng Wu.

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Wu, RS. Spin Squeezing of 4-Qubit State. Int J Theor Phys 51, 3387–3392 (2012). https://doi.org/10.1007/s10773-012-1218-3

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  • DOI: https://doi.org/10.1007/s10773-012-1218-3

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