Thermal Entanglement in Superconducting Quantum-Interference-Device Qubits Coupled to Cavity Field
PAN Hai-Zhong, KUANG Le-Man
Department of Physics, Hunan Normal University, Changsha 410081
Thermal Entanglement in Superconducting Quantum-Interference-Device Qubits Coupled to Cavity Field
PAN Hai-Zhong;KUANG Le-Man
Department of Physics, Hunan Normal University, Changsha 410081
关键词 ：
03.67.-a ,
03.65.Ud ,
85.25.Dq
Abstract ： We investigate thermal entanglement in a superconducting-quantum-interference-device qubit coupled to a cavity field. We show that the entanglement can be manipulated by varying temperature and an effective controlling parameter B which depends on the external field and characteristic parameters of the system. We find that there exists a critical value of the controlling parameter Bc . Under a fixed temperature, increasing B can increase entanglement in the regime of B < Bc , while the entanglement decreases with increasing B in the regime of B > Bc .
Key words ：
03.67.-a
03.65.Ud
85.25.Dq
出版日期: 2004-03-01
:
03.67.-a
(Quantum information)
03.65.Ud
(Entanglement and quantum nonlocality)
85.25.Dq
(Superconducting quantum interference devices (SQUIDs))
引用本文:
PAN Hai-Zhong;KUANG Le-Man. Thermal Entanglement in Superconducting Quantum-Interference-Device Qubits Coupled to Cavity Field[J]. 中国物理快报, 2004, 21(3): 424-427.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2004/V21/I3/424
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2004, Vol. 21 
