Sudden Death of Entanglement between Two Atoms with Initial Tripartite Entangled State in the Tavis--Cummings Model
YANG Qing1, YANG Ming1, CAO Zhuo-Liang 1,2
1Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Material Science, Anhui University, Hefei 2300392Department of Physics, Hefei Teachers College, Hefei 230061
Sudden Death of Entanglement between Two Atoms with Initial Tripartite Entangled State in the Tavis--Cummings Model
YANG Qing1;YANG Ming1;CAO Zhuo-Liang 1,2
1Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Material Science, Anhui University, Hefei 2300392Department of Physics, Hefei Teachers College, Hefei 230061
摘要We study the entanglement dynamics of two atoms with initial tripartite entangled W-like state in the Tavis--Cummings model. We find that the entanglement evolvement is sensitive not only to the entanglement degree of the initial state but also to the concrete form of the initial state. The so-called sudden death effect occurs only for some initial states.
Abstract：We study the entanglement dynamics of two atoms with initial tripartite entangled W-like state in the Tavis--Cummings model. We find that the entanglement evolvement is sensitive not only to the entanglement degree of the initial state but also to the concrete form of the initial state. The so-called sudden death effect occurs only for some initial states.
(Entanglement measures, witnesses, and other characterizations)
引用本文:
YANG Qing;YANG Ming;CAO Zhuo-Liang;. Sudden Death of Entanglement between Two Atoms with Initial Tripartite Entangled State in the Tavis--Cummings Model[J]. 中国物理快报, 2008, 25(3): 825-827.
YANG Qing, YANG Ming, CAO Zhuo-Liang,. Sudden Death of Entanglement between Two Atoms with Initial Tripartite Entangled State in the Tavis--Cummings Model. Chin. Phys. Lett., 2008, 25(3): 825-827.
[1] Nielsen M A and Chuang I L 2000 Quantum Computationand Quantum Information (Cambridge: Cambridge University Press) [2] Bennett C H, Brassard G, Cr\'{epeau C, Jozsa R, Peres A andWootters W K 1993 Phys. Rev. Lett. 70 1895 [3] Bennett C H and Wiesner S J 1992 Phys. Rev. Lett. 69 2881 [4] Ekert A K 1991 Phys. Rev. Lett. 67 661 Curty M, Lewenstein M and L\"ukenhaus N 2004 Phys. Rev.Lett. 92 217903 [5] Yu T and Eberly J H 2004 Phys. Rev. Lett. 93 140404 Yu T and Eberly J H 2006 Opt. Commun. 264 393 [6] Ficek Z and Tanas R 2006 Phys. Rev. A 74 024304 [7] Yu T and Eberly J H 2006 Phys. Rev. Lett. 97 140403 [8]Yu T and Eberly J H 2004 Phys. Rev. Lett. 93 14 [9]Y\"{ona\c{c M, Yu T and Eberly J H 2006 J. Phys. B 39 S621 [10] Roszak K and Machnikowski P 2006 Phys. Rev. A 73 022313 [11] Cui H T, Li K and Yi X X 2007 Phys. Lett. A 365 44 [12]Zhang G F and Chen Z Y 2007 Opt. Commun. 275 274 [13] Adbel-Aty M and Moya-Cessa H 2007 Phys. Lett. A. 369 372 [14]Vaglica A and Vetri G 2007 Phys. Rev. A 75 062120 [15]Tavis M and Cummings F W 1968 Phys. Rev. 170 379 [16]Nielsen M A and Chuang I L 2000 Quantum Computationand Quantum Information (Cambridge: Cambridge University Press) [17]Alber G et al 2001 Quantum Information (Berlin: Springer) [18]Tessier T E, Deutsch I H and Delgado A 2003 Phys. Rev. A 68 062316 [19]Wootters W K 1998 Phys. Rev. Lett. 80 2245 [20]Bergou J and Hillery M 1997 Phys. Rev. A 55 4585 [21]Yang M and Cao Z L 2004 Int. J. Quantum Information 2 231
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