Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

doi:10.1088/1674-1056/23/9/094204

›› 2014, Vol. 23 ›› Issue (9): 94204-094204.doi: 10.1088/1674-1056/23/9/094204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

马悦, 董锟, 田贵花

School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2013-12-17 修回日期:2014-03-02 出版日期:2014-09-15 发布日期:2014-09-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10875018 and 60578043).

Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

Ma Yue (马悦), Dong Kun (董锟), Tian Gui-Hua (田贵花)

School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-12-17 Revised:2014-03-02 Online:2014-09-15 Published:2014-09-15
Contact: Tian Gui-Hua E-mail:hua2007@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10875018 and 60578043).

摘要/Abstract

摘要： We investigate the dynamics of two qubits coupled with a quantum oscillator by using the adiabatic approximation method. We take account of the interaction between the qubits and show how the entanglement is affected by the interaction parameter. The most interesting result is that we can prolong the entanglement time or improve the entanglement degree by using an appropriate interaction parameter. As the generation and preservation of entanglement of qubits are crucial for quantum information processing, our research will be useful.

关键词: Jaynes-Cummings model, ultra-strong coupling, adiabatic approximation

Abstract: We investigate the dynamics of two qubits coupled with a quantum oscillator by using the adiabatic approximation method. We take account of the interaction between the qubits and show how the entanglement is affected by the interaction parameter. The most interesting result is that we can prolong the entanglement time or improve the entanglement degree by using an appropriate interaction parameter. As the generation and preservation of entanglement of qubits are crucial for quantum information processing, our research will be useful.

Key words: Jaynes-Cummings model, ultra-strong coupling, adiabatic approximation

中图分类号: (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)

42.50.Md

03.65.Ud (Entanglement and quantum nonlocality) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

马悦, 董锟, 田贵花. Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator[J]. , 2014, 23(9): 94204-094204.

Ma Yue (马悦), Dong Kun (董锟), Tian Gui-Hua (田贵花). Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator[J]. Chin. Phys. B, 2014, 23(9): 94204-094204.

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Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

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