Controlling quantum discord dynamics in cavity QED systems by applying a classical driving field with phase decoherence

doi:10.1088/1674-1056/21/3/030305

Abstract We investigate a two-level atom interacting with a quantized cavity field and a classical driving field in the presence of phase decoherence and find that a stationary quantum discord can arise in the interaction of the atom and cavity field as the time turns to infinity. We also find that the stationary quantum discord can be increased by applying a classical driving field. Furthermore, we explore the quantum discord dynamics of two identical non-interacting two-level atoms independently interacting with a quantized cavity field and a classical driving field in the presence of phase decoherence. Results show that the quantum discord between two atoms is more robust than entanglement under phase decoherence and the classical driving field can help to improve the amount of quantum discord of the two atoms.

Keywords: stationary quantum discord classical driving field phase decoherence

Received: 24 September 2011
Revised: 05 November 2011
Accepted manuscript online:

PACS:	03.67.-a	(Quantum information)
	03.65.Ya

Fund: Project supported by National Natural Science Foundation of China (Grant No. 10774143).

Corresponding Authors: Xu Jing-Bo,xujb@zju.edu.cn
E-mail: xujb@zju.edu.cn

Cite this article:

Qian Yi(钱懿) and Xu Jing-Bo(许晶波) Controlling quantum discord dynamics in cavity QED systems by applying a classical driving field with phase decoherence 2012 Chin. Phys. B 21 030305

[1]	Einstein A, Podolsky B and Rosen N 1935 Phys. Rev. 47 777
[2]	Nielsen M A and Chuand I L 2000 Quantum Computation and Quantum Information (Cambridge: Cambridge University Press)
[3]	Hagley E, Maitre X, Nogues G, Wunderlich C, Brune M, Raimond J M and Haroche S 1997 Phys. Rev. Lett. 79 1
[4]	Rauschenbeutel A, Nogues G, Osnaghi S, Bertet P, Brune M, Raimond J M and Haroche S 2000 Science 288 2024
[5]	Brennecke F, Donner T, Ritter S, Bourdel T, Kohl M and Esslinger T 2007 Nature 450 268
[6]	McKeever J, Buck J R, Boozer A D, Kuzmich A, Nagerl H C, Stamper-Kurn D M and Kimble H J 2003 Phys. Rev. Lett. 90 133602
[7]	Deng Z J, Feng M and Gao K L 2007 Phys. Rev. A 75 024302
[8]	Braunstein S L, Caves C M, Jozsa R, Linden N, Popescu S and Schack R 1999 Phys. Rev. Lett. 83 1054
[9]	Meyer D A 2000 Phys. Rev. Lett. 85 2014
[10]	Datta A, Shaji A and Caves C M 2008 Phys. Rev. Lett. 100 050502
[11]	Lanyon B P, Barbieri M, Almeida M P and White A G 2008 Phys. Rev. Lett. 101 200501
[12]	Ollivier H and Zurek W H 2001 Phys. Rev. Lett. 88 017901
[13]	Bennett C H, DiVincenzo D P, Fuchs C A, Mor T, Rains E, Shor P W, Smolin J A and Wootters W K 1999 Phys. Rev. A 59 1070
[14]	Horodecki M, Horodecki P, Horodecki R, Oppenheim J, Sen A, Sen U and Synak-Radtke B 2005 Phys. Rev. A 71 062307
[15]	Vedreal V 2010 Found. Phys. 40 1141
[16]	Yeo Y 2008 Phys. Rev. A 78 022334
[17]	Merali Z 2011 Nature 474 24
[18]	Werlang T, Souza S, Fanchini F F and Villas Boas C J 2009 Phys. Rev. A 80 024103
[19]	Wang B, Xu Z Y, Chen Z Q and Feng M 2010 Phys. Rev. A 81 014101
[20]	Mazzola L, Piilo J and Maniscalco S 2010 Phys. Rev. Lett. 104 200401
[21]	Xu J S, Xu X Y, Li C F, Zhang C J, Zou X B and Guo G C 2010 Nature Communications 1 7
[22]	Solano E, Agarwal G S, and Walther H 2003 Phys. Rev. Lett. 90 027903
[23]	Zhang J S and Xu J B 2009 Opt. Commun. 282 2543
[24]	Xu J B and Li S B 2005 Eur. Phys. J. D 35 553
[25]	Xu J B and Zhang Y Q 2011 Eur. Phys. J. D 63 483
[26]	Ali M, Rau A R P and Alber G 2010 Phys. Rev. A 81 042105
[27]	Wootters W K 1998 Phys. Rev. Lett. 80 2245

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Controlling quantum discord dynamics in cavity QED systems by applying a classical driving field with phase decoherence

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