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Spin Squeezing in Superpositions of GHZ State and W States

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Abstract

We investigate the spin squeezing in superpositions of a N-qubit GHZ state and two W states. The spin squeezing parameter is determined by the superposition coefficients and the relative phase. It is shown that there is squeezing in the n 2 direction and there is no squeezing in the n 1 direction. It is also shown that the state with more number of qubits has smaller spin squeezing parameter.

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Authors and Affiliations

  1. College of Communication and Electron, Jiangxi Science and Technology Normal University, Nanchang, 330013, P.R. China

    Xiao-Jie Yi & Jian-Min Wang

  2. Jiangxi University of Finance and Economics, Nanchang, 330013, P.R. China

    Guo-Qiang Huang

Authors
  1. Xiao-Jie Yi
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  2. Guo-Qiang Huang
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  3. Jian-Min Wang
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Correspondence to Xiao-Jie Yi.

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Yi, XJ., Huang, GQ. & Wang, JM. Spin Squeezing in Superpositions of GHZ State and W States. Int J Theor Phys 51, 2960–2965 (2012). https://doi.org/10.1007/s10773-012-1177-8

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  • DOI: https://doi.org/10.1007/s10773-012-1177-8

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