Entanglement in a generalized Jaynes-Cummings model

Guo Feng Zhang; Jia Liu

doi:10.1088/1009-1963/16/12/007

Entanglement in a generalized Jaynes-Cummings model

Guo Feng Zhang^*
, Jia Liu

^*Corresponding author for this work

School of Physics

Beihang University

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

We investigate the pairwise entanglement and global entanglement in a generalized Jaynes-Cummings model, which can be used to realize Greenberger-Horne-Zeilinger (GHZ) entangled state (Zheng S B 2001 Phys. Rev. Lett. 87 230404). Our results show that the W-type entangled states cannot be generated based on the model. The dependences of entanglement on Rabi frequency λ and dipole-dipole coupling strength Ω are given. It is found that there exists the quantum phase transition when λ = Ω. For typical experimental data, the critical temperature for pairwise entanglement is on the order of 10^-6 K. Based on these results, two strategies that overcome decoherence are proposed.

Original language	English
Pages (from-to)	3595-3600
Number of pages	6
Journal	Chinese Physics (Overseas Edition)
Volume	16
Issue number	12
DOIs	https://doi.org/10.1088/1009-1963/16/12/007
State	Published - 1 Dec 2007

Keywords

Decoherence
Dipole-dipole coupling strength
Thermal entanglement

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abstract = "We investigate the pairwise entanglement and global entanglement in a generalized Jaynes-Cummings model, which can be used to realize Greenberger-Horne-Zeilinger (GHZ) entangled state (Zheng S B 2001 Phys. Rev. Lett. 87 230404). Our results show that the W-type entangled states cannot be generated based on the model. The dependences of entanglement on Rabi frequency λ and dipole-dipole coupling strength Ω are given. It is found that there exists the quantum phase transition when λ = Ω. For typical experimental data, the critical temperature for pairwise entanglement is on the order of 10-6 K. Based on these results, two strategies that overcome decoherence are proposed.",

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T1 - Entanglement in a generalized Jaynes-Cummings model

AU - Zhang, Guo Feng

AU - Liu, Jia

PY - 2007/12/1

Y1 - 2007/12/1

N2 - We investigate the pairwise entanglement and global entanglement in a generalized Jaynes-Cummings model, which can be used to realize Greenberger-Horne-Zeilinger (GHZ) entangled state (Zheng S B 2001 Phys. Rev. Lett. 87 230404). Our results show that the W-type entangled states cannot be generated based on the model. The dependences of entanglement on Rabi frequency λ and dipole-dipole coupling strength Ω are given. It is found that there exists the quantum phase transition when λ = Ω. For typical experimental data, the critical temperature for pairwise entanglement is on the order of 10-6 K. Based on these results, two strategies that overcome decoherence are proposed.

AB - We investigate the pairwise entanglement and global entanglement in a generalized Jaynes-Cummings model, which can be used to realize Greenberger-Horne-Zeilinger (GHZ) entangled state (Zheng S B 2001 Phys. Rev. Lett. 87 230404). Our results show that the W-type entangled states cannot be generated based on the model. The dependences of entanglement on Rabi frequency λ and dipole-dipole coupling strength Ω are given. It is found that there exists the quantum phase transition when λ = Ω. For typical experimental data, the critical temperature for pairwise entanglement is on the order of 10-6 K. Based on these results, two strategies that overcome decoherence are proposed.

KW - Decoherence

KW - Dipole-dipole coupling strength

KW - Thermal entanglement

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DO - 10.1088/1009-1963/16/12/007

M3 - 文章

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SN - 1009-1963

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EP - 3600

JO - Chinese Physics (Overseas Edition)

JF - Chinese Physics (Overseas Edition)

IS - 12

ER -

Entanglement in a generalized Jaynes-Cummings model

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Keywords

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