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Open Quantum Systems Decoherence Entanglement Theory Quantum Correlations

Spin Squeezing, Negative Correlations, and Concurrence in the Quantum Kicked Top Model

arXiv
Authors: Xiaoqian Wang, Jian Ma, Lijun Song, Xihe Zhang, Xiaoguang Wang

Year

2010

Paper ID

11036

Status

Preprint

Abstract Read

~2 min

Abstract Words

96

Citations

N/A

Abstract

We study spin squeezing, negative correlations, and concurrence in the quantum kicked top model. We prove that the spin squeezing and negative correlations are equivalent for spin systems with only symmetric Dicke states populated. We numerically analyze spin squeezing parameters and concurrence in this model, and find that the maximal spin squeezing direction, which refers to the minimal pairwise correlation direction, is strongly influenced by quantum chaos. Entanglement (spin squeezing) sudden death and sudden birth occur alternatively for the periodic and quasi-periodic cases, while only entanglement (spin squeezing) sudden death is found for the chaotic case.

Why This Paper Matters

  • This paper contributes to the Entanglement Theory & Quantum Correlations research area in the Quantum Articles archive.
  • It adds a 2010 reference point for readers tracking recent quantum research.
  • We study spin squeezing, negative correlations, and concurrence in the quantum kicked top model.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1010.0109 [2] arXiv https://arxiv.org/abs/1010.0109 [3] Publisher https://arxiv.org/abs/1010.0109

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