摘要A spectator system in an atoms-cavity QED model is investigated. The subsystem initial state is prepared as one of the Bell states or one mixed state. It is shown that (i) the dynamics of Bell states are independent on the initial states; (ii) the concurrence dynamics can be engineered by a controlling light field.
Abstract：A spectator system in an atoms-cavity QED model is investigated. The subsystem initial state is prepared as one of the Bell states or one mixed state. It is shown that (i) the dynamics of Bell states are independent on the initial states; (ii) the concurrence dynamics can be engineered by a controlling light field.
[1] Breuer H P and Petruccione F 2002 The Theory of OpenQuantum Systems (Oxford: Oxford University Press) [2] Vojta M 2006 Phil. Mag. 86 1807 [3] Nielsen M A and Chuang I L 2000 Quantum Computationand Quantum Information (Cambridge: Cambridge University Press) [4] Weiss U 1999 Quantum Dissipative Systems, 2nd edn (Singapore: WorldScientific) [5] Breuer H P, Burgarth D, and Petruccione F 2004 Phys.Rev. B 70 045323 [6] Bennett C H, Bernstein H J, Popescu S, and Schumacher B1996 Phys. Rev. A 53 2046 [7] Horodecki R, Horodecki P, Horodecki M, and Horodecki K2007 arXiv:quant-ph/0702225 [8] Werner R F 1989 Phys. Rev. A 40 4277 [9] Greenberger D M, Horne M, and Zeilinger A 1989 Bell'sTheorem, Quantum Theory, and Conceptions of the Universe (Dordrecht:Kluwer) [10] D\"ur W, Vidal G, and Cirac J I 2000 Phys. Rev. A 62 062314 [11] Loss D, and DiVincenzo D P 1998 Phys. Rev. A 57 120 [12] Kane B E 1998 Nature (London) 393 133 [13] Tana\'{s R and Ficek Z 2004 J. Opt. B 6 90 [14] Jordan T F, Shaji A, and Sudarshan E C G 2007arXiv:quant-ph/0704.0461v1 [15] Schumacher B 1996 Phys. Rev. A 54 2614 [16] Barnum H, Nielsen M A and Schumacher B 1998 Phys.Rev. A 57 4153 [17] Seligman T H 2007 arXiv:0711.4642v1 [18] Jing J, L\"u Z G and Yang G H 2007 Phys. Rev. A 76 032322 [19] Yu T and Eberly J H 2004 Phys. Rev. Lett 93140404 [20] Bose S, Knight P L, Plenio M B and Vedral V 1999 Phys. Rev. Lett. 83 5158 [21] Hill S and Wootters W K 1997 Phys. Rev. Lett. 78 5022 [22] Wootters W K 1998 Phys. Rev. Lett. 80 2245 [23] Haroche S 1992 Fundamental Systems in QuantumOptics (Amsterdam: North Holland) [24] Ficek Z and Tana\'{s R 2008 Phys. Rev. A 77054301
2008, Vol. 25 
