A Lower Bound on the Entanglement in the Jaynes--Cummings Model
CAI Jin-Fang, ZOU Jian
Department of Physics, Beijing Institute of Technology, Beijing 100081
A Lower Bound on the Entanglement in the Jaynes--Cummings Model
CAI Jin-Fang;ZOU Jian
Department of Physics, Beijing Institute of Technology, Beijing 100081
关键词 ：
03.65.Ud ,
03.67.-a ,
42.50.Dv
Abstract ： The entanglement between an atom and field is investigated by using the Jaynes--Cummings model. The initial atomic state is supposed in a mixed state and the field is in a squeezed state. The lower bound on the entanglement quantified by concurrence is calculated. It is found that the entanglement with the atom being initially in a mixed state can be larger than that with the atom being initially in a pure state. The entanglement is not a monotone function of the squeezing parameter r of the field and it achieves the maximum for certain r and then decreases with further increase of r.
Key words ：
03.65.Ud
03.67.-a
42.50.Dv
出版日期: 2005-07-01
:
03.65.Ud
(Entanglement and quantum nonlocality)
03.67.-a
(Quantum information)
42.50.Dv
(Quantum state engineering and measurements)
[1]
ZHANG Zhi-Ming;YANG Jian;YU Ya-Fei. A Scheme for Generating Entangled Squeezed States Based on Cavity QED
[2]
LIU Dan;ZHANG Yong;LIU Yang;LONG Gui-Lu;. Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current
[3]
YANG Wen-Xing. Preparation of Cluster States with Trapped Ions in Thermal Motion
[4]
LI Xi-Han;LI Chun-Yan;DENG Fu-Guo;;ZHOU Ping;LIANG Yu-Jie; ZHOU Hong-Yu;. Multiparty Quantum Remote Secret Conference
[5]
MAN Zhong-Xiao;XIA Yun-Jie. Improvement of Security of Three-Party Quantum Secure Direct Communication Based on GHZ States
[6]
CHEN Yan;MAN Zhong-Xiao;XIA Yun-Jie. Quantum Bidirectional Secure Direct Communication via Entanglement Swapping
[7]
YAO Kai-Lun;SUN Xiao-Zhong;LIU Zu-Li;LI Yan-Chao;YU Li;GAO Guo-Ying. Block Entanglement in the Single-Hole Hubbard Model
[8]
AHMAD Muhammad Ashfaq;ZENG Ran;LIU Shu-Tian. Nonclassical Properties of Superposition of Two Coherent States Shifted in Phase by 3π/2
[9]
ZHENG Shi-Biao. Teleportation of Quantum States through Mixed Entangled Pairs
[10]
YU Zhao-Xian;LIANG Jiu-Qing;JIAO Zhi-Yong. Quantum Effects of Many Atoms in Spinor Bose--Einstein Condensates
[11]
ZHAN Zhi-Ming;YANG Wen-Xing;LI Wei-Bin;LI Jia-Hua. Efficient Scheme for Greenberger--Horne--Zeilinger State and Cluster State with Trapped Ions
[12]
ZHENG Xiao-Juan;FANG Mao-Fa;LIAO Xiang-Ping;CAI Jian-Wu. Teleportation for an Ionic Entangled Internal State by Entanglement Swapping
[13]
HAN Lian-Fang;LIU Yi-Min;ZHANG Zhan-Jun;. Multiparty Quantum Secret Sharing of Classical Message using Cavity Quantum Electrodynamic System
[14]
DENG Fu-Guo;;LI Xi-Han;LI Chun-Yan;ZHOU Ping;LIANG Yu-Jie;ZHOU Hong-Yu;. Multiparty Quantum Secret Report
[15]
ZHAO Hui. Separability Criteria for Quantum Mixed States in Terms of Trace Norm
2005, Vol. 22 
