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题名: Coherent Preservation of Two-Qubit Quantum Entanglement in the Strong Coupling Region
作者: Tian, GH ;  Zhong, SQ
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2014
卷号: 62, 期号:5, 页码:721-728
关键词: N-ATOM SYSTEM ;  RADIATION
学科分类: Physics
通讯作者: Tian, GH (reprint author), Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China.
部门归属: [Tian Gui-Hua] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China ;  [Tian Gui-Hua] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China ;  [Zhong Shu-Quan] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
英文摘要: The entanglement of two qubits is investigated in the range of their ultra-strongly coupling with a quantum oscillator. The two qubits are initially in four Bell states and they are under the control mechanism of the coherent state of the quantum oscillator. There are four parameters: the average number of the coherent state, the ultra-strong coupling strength, the ratio of two frequencies of qubit and oscillator, and the inter-interaction coupling of the two qubits in the mechanism, and they all are influential parameters on the entanglement of the two qubits. One Bell state vertical bar I-0 > is easyily kept and is trivial case. The novel results show that there is one state vertical bar I-0 > among the other three Bell states which the entanglement of the two qubits could be almost completely preserved. The possibility is made into reality by the appropriate choice of the four influential parameters. We give two different schemes to choose the respective parameters to maintain the entanglment of vertical bar I-0 > almost undiminished. The results will be useful for the quantum information process.
资助者: Major State Basic Research Development Program of China (973 Program) [2010CB923202]; National Natural Science of China [10875018]
收录类别: SCI
语种: 英语
WOS记录号: WOS:000347465000016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15584
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Tian, GH,Zhong, SQ. Coherent Preservation of Two-Qubit Quantum Entanglement in the Strong Coupling Region[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2014,62(5):721-728.
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