摘要We study the effects of purity on entanglement dynamics of a multipartite system in cavity QED. Three two-level atoms A, B and C are initially prepared in an entangled state and locally coupled with independent cavities a, b and c, respectively. We consider the effects of purity of atomic initial state on the entanglement evolution of both the systems of atoms and cavities. It is found that depending on the purity of atomic initial state, the entanglement of atoms (cavities) may or may not exhibit the sudden death (birth) phenomenon.
Abstract：We study the effects of purity on entanglement dynamics of a multipartite system in cavity QED. Three two-level atoms A, B and C are initially prepared in an entangled state and locally coupled with independent cavities a, b and c, respectively. We consider the effects of purity of atomic initial state on the entanglement evolution of both the systems of atoms and cavities. It is found that depending on the purity of atomic initial state, the entanglement of atoms (cavities) may or may not exhibit the sudden death (birth) phenomenon.
ZHANG Yu-Shi. Effects of Purity on Dynamics of Multipartite Entanglement[J]. 中国物理快报, 2008, 25(9): 3146-3149.
ZHANG Yu-Shi. Effects of Purity on Dynamics of Multipartite Entanglement. Chin. Phys. Lett., 2008, 25(9): 3146-3149.
[1] Cai Q Y and Li B W 2004 Chin. Phys. Lett. 21601 [2] Cai Q Y and Li B W 2004 Phys. Rev. A 69054301 [3] Long G L and Liu X S 2002 Phys. Rev. A 65032302 [4] Deng F G and Long G L 2003 Phys. Rev. A 68042315 [5] Zhou Z W, Han Y J and Guo G C 2006 Phys. Rev. A 74 052334 [6] Zhang X L, Gao K L and Feng M 2006 Phys. Rev. A 74 024303 [7] Wootters W K 1998 Phys. Rev. Lett. 80 2245 [8] Vidal G and Werner R F 2002 Phys. Rev. A 65032314 [9] Yu T and Eberly J H 2004 Phys. Rev. Lett. 93140404 [10] Eberly J H and Yu T 2007 Science 316 555 [11] Yu T and Eberly J H 2006 Phys. Rev. Lett. 97140403 [12] Yu T and Eberly J H 2006 Opt. Commun. 264393 [13] Yu T and Eberly J H 2007 Quantum Inf. Comput. 7 459 [14] Y\"{ona\c{c M, Yu T and Eberly J H 2006 J. Phys.B: At. Mol. Opt. Phys. 39 S621 [15] Y\"{ona\c{c M, Yu T and Eberly J H 2007 J. Phys.B: At. Mol. Opt. Phys. 40 S45 [16] Sainz I and Bj\"{ork G 2007 Phys. Rev. A 76 042313 [17] Ficek Z and Tana\'{s R 2006 Phys. Rev. A 74024304 [18] Liu R F and Chen C C 2006 Phys. Rev. A 74024102 [19] Cui H T, Li K and Yi X X 2007 Phys. Lett. A 365 44 [20] Sun Z, Wang X G and Sun C P 2007 Phys. Rev. A 75 062312 [21] Yi X X and Wang W 2007 Phys. Rev. A 76042109 [22] Wang W, Fu L B and Yi X X 2007 Phys. Rev. A 75 045601 [23] Ma Z H and Wang X G 2007 Phys. Rev. A 75014304 [24] Almeida M P et al. 2007 Science 316579 [25] C. Simon and J. Kempe 2002 Phys. Rev. A 65052327 [26] Carvalho A R R, Mintert F and Buchleitner A 2004 Phys. Rev. Lett. 93 230501 [27] Mintert F, Carvalho A R R, Kus M and Buchleitner A 2005 Phys. Rep. 415 207 [28] L. Aolita, R. Chaves, D. Cavalcanti, A. Ac\'{in and L.Davidovich 2008 Phys. Rev. lett. 100 080501 [29] Jaynes E T and Cummings F W 1963 Proc. IEEE 51 89 [30] Man Z X, Xia Y J and Nguyen B A 2008 J. Phys. B: At.Mol. Opt. Phys. 41 085503
2008, Vol. 25 
