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Controlling Spin Squeezing and Quantum Fisher Information with a Strong External Field

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Abstract

We investigate spin squeezing and quantum Fisher information dynamics of a collection of interacting spins with a strong external field. Approximate analytical expressions of the spin squeezing parameter and quantum Fisher information are presented. Our analysis shows that the spin squeezing always appears in the z direction with an extended period and that spin squeezing and quantum Fisher information are controlled by adjusting the strength of the internal field and the total atomic number.

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  1. Department of Physics, Hunan Normal University, Changsha, 410081, People’s Republic of China

    Song-Song Li

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  1. Song-Song Li
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Correspondence to Song-Song Li.

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Li, SS. Controlling Spin Squeezing and Quantum Fisher Information with a Strong External Field. Int J Theor Phys 50, 767–773 (2011). https://doi.org/10.1007/s10773-010-0613-x

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  • DOI: https://doi.org/10.1007/s10773-010-0613-x

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