Chin. Phys. Lett.  2004, Vol. 21 Issue (3): 424-427    DOI:
Original Articles |
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
Cite this article:   
PAN Hai-Zhong, KUANG Le-Man 2004 Chin. Phys. Lett. 21 424-427
Download: PDF(281KB)  
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
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.

Keywords: 03.67.-a      03.65.Ud      85.25.Dq     
Published: 01 March 2004
PACS:  03.67.-a (Quantum information)  
  03.65.Ud (Entanglement and quantum nonlocality)  
  85.25.Dq (Superconducting quantum interference devices (SQUIDs))  
TRENDMD:   
URL:  
https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I3/0424
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
PAN Hai-Zhong
KUANG Le-Man
Related articles from Frontiers Journals
[1] 天琦 窦,吉鹏 王,振华 李,文秀 屈,舜禹 杨,钟齐 孙,芬 周,雁鑫 韩,雨晴 黄,海强 马. A Fully Symmetrical Quantum Key Distribution System Capable of Preparing and Measuring Quantum States*

Supported by the Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A02), and the State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (Grant No. IPO2019ZT06).

[J]. Chin. Phys. Lett., 2020, 37(11): 424-427
[2] LIU Kui, CUI Shu-Zhen, YANG Rong-Guo, ZHANG Jun-Xiang, GAO Jiang-Rui. Experimental Generation of Multimode Squeezing in an Optical Parametric Amplifier[J]. Chin. Phys. Lett., 2012, 29(6): 424-427
[3] REN Jie, WU Yin-Zhong, ZHU Shi-Qun. Quantum Discord and Entanglement in Heisenberg XXZ Spin Chain after Quenches[J]. Chin. Phys. Lett., 2012, 29(6): 424-427
[4] XIANG Shao-Hua**,DENG Xiao-Peng,SONG Ke-Hui. Protection of Two-Qubit Entanglement by the Quantum Erasing Effect[J]. Chin. Phys. Lett., 2012, 29(5): 424-427
[5] SHAN Chuan-Jia,**,CAO Shuai,XUE Zheng-Yuan,ZHU Shi-Liang. Anomalous Temperature Effects of the Entanglement of Two Coupled Qubits in Independent Environments[J]. Chin. Phys. Lett., 2012, 29(4): 424-427
[6] QIAN Yi,XU Jing-Bo**. Enhancing Quantum Discord in Cavity QED by Applying Classical Driving Field[J]. Chin. Phys. Lett., 2012, 29(4): 424-427
[7] GAO Gui-Long,SONG Fu-Quan,HUANG Shou-Sheng,WANG Yan-Wei,FAN Zhi-Qiang,YUAN Xian-Zhang,JIANG Nian-Quan**. Producing and Distinguishing χ-Type Four-Qubit States in Flux Qubits[J]. Chin. Phys. Lett., 2012, 29(4): 424-427
[8] LI Hong-Rong**,ZHANG Pei,GAO Hong,BI Wen-Ting,ALAMRI M. D.,LI Fu-Li. Non-Equilibrium Quantum Entanglement in Biological Systems[J]. Chin. Phys. Lett., 2012, 29(4): 424-427
[9] Arpita Maitra, Santanu Sarkar. On Universality of Quantum Fourier Transform[J]. Chin. Phys. Lett., 2012, 29(3): 424-427
[10] QIN Meng, ZHAI Xiao-Yue, CHEN Xuan, LI Yan-Biao, WANG Xiao, BAI Zhong. Effect of Spin-Orbit Interaction and Input State on Quantum Discord and Teleportation of Two-Qubit Heisenberg Systems[J]. Chin. Phys. Lett., 2012, 29(3): 424-427
[11] GE Rong-Chun, LI Chuan-Feng, GUO Guang-Can. Spin Dynamics in the XY Model[J]. Chin. Phys. Lett., 2012, 29(3): 424-427
[12] M. Ramzan. Decoherence and Multipartite Entanglement of Non-Inertial Observers[J]. Chin. Phys. Lett., 2012, 29(2): 424-427
[13] Piotr Zawadzki**. New View of Ping-Pong Protocol Security[J]. Chin. Phys. Lett., 2012, 29(1): 424-427
[14] GU Shi-Jian**, WANG Li-Gang, WANG Zhi-Guo, LIN Hai-Qing. Repeater-Assisted Zeno Effect in Classical Stochastic Processes[J]. Chin. Phys. Lett., 2012, 29(1): 424-427
[15] LI Jun-Gang, **, ZOU Jian, **, XU Bao-Ming, SHAO Bin, . Quantum Correlation Generation in a Damped Cavity[J]. Chin. Phys. Lett., 2011, 28(9): 424-427
Viewed
Full text


Abstract