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International Journal of Theoretical Physics

, Volume 52, Issue 3, pp 820–826 | Cite as

Spin Squeezing in Superposition of Four-Qubit Symmetric State and W States

  • Zhiyong Liu
Article

Abstract

We investigate the entanglement property of a four-qubit state superposed by a four-qubit GHZ state and a symmetric state with spin squeezing. Numerically and analytic solutions for spin squeezing parameters are given. The squeezed parameters depend on the superpose coefficients and the relative phases. It is shown that there is no spin squeezing at n 1 direction and it occurs at n 2 direction under some conditions.

Keywords

Spin squeezing Superposition Symmetric state W state 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Faculty of ScienceJiangxi University of Science and TechnologyGanzhouPeople’s Republic of China

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