Investigations on quantum correlation of coupled qubits in squeezed vacuum reservoir

doi:10.1088/1674-1056/22/2/020305

Abstract In this paper, we investigate the quantum correlation of coupled qubits which are initially in maximally entangled mixed states in squeezed vacuum reservoir. We compare and analyse the effects of squeezed parameters on quantum discord and quantum concurrence. The results show that in squeezed vacuum reservoir, the quantum discord and quantum concurrence perform completely opposite behaviors to the change of squeezed parameters. Quantum discord survives longer with the increase of squeezed amplitude parameter, but entanglement death turns faster on the contrary. The results also indicate that the classical correlation of the system is smaller than quantum discord in vacuum reservoir, while it is bigger than quantum discord in squeezed vacuum reservoir. The quantum discord and classical correlation are more robust than quantum concurrence in the two reservoir environments, which indicates that the entanglement actually is easily affected by decoherence and quantum discord has stronger ability to avoid decoherence in squeezed vacuum reservoir.

Keywords: quantum correlation coupled qubits quantum discord concurrence

Received: 20 April 2012
Revised: 10 July 2012
Accepted manuscript online:

PACS:	03.65.Ta	(Foundations of quantum mechanics; measurement theory)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.-a	(Quantum information)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11164009).

Corresponding Authors: Ji Ying-Hua
E-mail: ahmxhxtt@yahoo.cn

Cite this article:

Ji Ying-Hua (嵇英华), Liu Yong-Mei (刘咏梅) Investigations on quantum correlation of coupled qubits in squeezed vacuum reservoir 2013 Chin. Phys. B 22 020305

[1]	Jones J A, Vedral V, Ekert A and Castagnoli G 2000 Nature (London) 403 869
[2]	Duan L M, Cirac J I and Zoller P 2001 Science 292 1695
[3]	Ji Y H, Liu Y M and Wang Z S 2011 Chin. Phys. B 20 070304
[4]	Almeida M P, de Melo F, Hor-Meyll M, Salles A, Walborn S P, Souto Ribeiro P H and Davidovich L 2007 Science 316 579
[5]	Lopez C E, Romero G, Lastra F, Solano E and Retamal J C 2008 Phys. Rev. Lett. 101 080503
[6]	Li P, Zhang Q and You J Q 2009 Phys. Rev. A 79 014303
[7]	Yu T and Eberly J H 2009 Science 323 598
[8]	Mintert F, Carvalho A R R, Kus M and Buchleitner A 2005 Phys. Rep. 415 207
[9]	Ollivier H and Zurek W H 2001 Phys. Rev. Lett. 88 017901
[10]	Datta A, Shaji A and Caves C M 2008 Phys. Rev. Lett. 100 050502
[11]	Xu J S, Xu X Y, Li C F, Zhang C J, Zou X B and Guo G C 2010 Nature Commun. 10.1038 1005
[12]	Qian Y and Xu J B 2012 Chin. Phys. B 21 030305
[13]	IKram M, Li F L and Zubairy M S 2007 Phys. Rev. A 75 062336
[14]	Hernandez M and Orszag M 2008 Phys. Rev. A 78 042114
[15]	Mazzola L, Piilo J and Maniscalco S 2010 Phys. Rev. Lett. 104 200401
[16]	Wootters W K 1998 Phys. Rev. Lett. 80 2245
[17]	Ali M, Rau A R P and Alber G 2010 Phys. Rev. A 81 042105
[18]	Henderson L and Vedral V 2001 J. Phys. A: Math. Gen. 34 6899
[19]	Jin J S, Yu C S, Pei P and Song H S 2010 J. Opt. Soc. Am. B 27 1799
[20]	Wang C Z, Li C X, Nie L Y and Li J F 2011 J. Phys. B: At. Mol. Opt. 44 015503
[21]	Ishizaka S and Hiroshima T 2001 Phys. Rev. A 62 022310

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