International Journal of Theoretical Physics

, Volume 52, Issue 11, pp 3808–3812 | Cite as

Single-Particle Coherence and Spin Squeezing in Four-Qubit Phase State

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Abstract

We investigate single-particle coherence and spin squeezing in four-qubit phase state governed by an one-axis twisting Hamiltonian. In particular, we are interesting in the dependence of single-particle coherence and spin squeezing on the nonlinear interaction. It is shown that single-particle coherence and spin squeezing parameter only depend on the nonlinear interaction and they are periodic function of nonlinear interaction.

Keywords

Single-particle coherence Spin squeezing Nonlinear interaction Phase state One-axis twisting 
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Notes

Acknowledgements

The authors are grateful to Song-Song Li for useful discussions that took place for the duration of this work.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Vocational and Technical CollegeXinyu CollegeXinyuPeople’s Republic of China

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