Dynamics of quantum discord in a two-qubit system under classical noise

doi:10.1088/1674-1056/23/3/034204

Abstract We study the quantum discord dynamics of two noninteracting qubits that are, respectively, subject to classical noise. The results show that the dynamics of quantum discord are dependent on both the coupling between the qubits and classical noise, and the average switching rate of the classical noise. In the weak-coupling Markovian region, quantum discord exhibits exponent decay without revival, and can be well protected by increasing the average classical noise switching rate. While in the strong-coupling non-Markovian region, quantum discord reveals slowly decayed oscillations with quick revival by decreasing the average switching rate of the classical noise. Thus, our results provide a new method of protecting quantum discord in a two-qubit system by controlling the coupling between the qubits and classical noise, and the average switching rate of the classical noise.

Keywords: quantum discord non-Markovian region classical noise

Received: 28 July 2013
Revised: 21 August 2013
Accepted manuscript online:

PACS:

42.50.Dv

(Quantum state engineering and measurements)

Fund: Projects supported by the National Natural Science Foundation of China (Grant No. 11074072).

Corresponding Authors: Fang Mao-Fa
E-mail: mffang@hunnu.edu.cn

Cite this article:

Guo You-Neng (郭有能), Fang Mao-Fa (方卯发), Liu Xiang (刘翔), Yang Bai-Yuan (杨百元) Dynamics of quantum discord in a two-qubit system under classical noise 2014 Chin. Phys. B 23 034204

[1]	Nielsen M A and Chuang I L 2000 Quantum Computation and Quantum Information (Cambridge: Cambridge University Press)
[2]	Schumacher B and Westmoreland M D 2006 Phys. Rev. A 74 042305
[3]	Ollivier H and Zurek W H 2001 Phys. Rev. Lett. 88 017901
[4]	Xu J W and Chen Q H 2012 Chin. Phys. B 21 040302
[5]	Ding B F, Wang X Y, Liu J F, Yan L and Zhao H P 2011 Chin. Phys. Lett. 28 104216
[6]	Tian L J, Zhang C Y and Qin L G 2013 Chin. Phys. Lett. 30 050303
[7]	Wang X Y, Ding B F and Zhao H P 2013 Chin. Phys. B 22 020309
[20]	Maziero J, Werlang T, Fanchini F F, Celeri L C and Serra R M 2010 Phys. Rev. A 81 022116
[21]	He Q L, Xu J B, Yao D X and Zhang Y Q 2011 Phys. Rev. A 84 022312
[22]	Franco R L, Bellomo B, Andersson E and Compagno G 2012 Phys. Rev. A 85 032318
[23]	Marzzola L, Piilo J and Maniscalco S 2010 Phys. Rev. Lett. 104 200401
[8]	Madhok V and Datta A 2011 Phys. Rev. A 83 032323
[9]	Datta A 2009 Phys. Rev. A 80 052304
[10]	Girolami D and Adesso G 2011 Phys. Rev. A 83 052108
[11]	Luo S L 2008 Phys. Rve. A 77 042303
[12]	Ji Y H, Hu J J and Hu Y 2012 Chin. Phys. B 21 110304
[13]	Li N and Luo S L 2007 Phys. Rev. A 76 032317
[14]	Dillenschneider R 2008 Phys. Rev. B 78 224413
[15]	Sarandy M S 2009 Phys. Rev. A 80 022108
[16]	Mazhar A, Rau A R P and Alber G 2010 Phys. Rev. A 81 042105
[17]	Fanchini F F, Werlang T, Brasil C A, Arruda L G E and Caldeira A O 2010 Phys. Rev. A 81 052107
[18]	Werlang T, Souza S, Fanchini F F and Villas B C J 2009 Phys. Rev. A 80 024103
[19]	Galve F, Giorgi G L and Zambrini R 2011 Phys. Rev. A 83 012102
[24]	Wang C Z, Li C X, Liu Y N and Li J F 2011 J. Phys. B: At. Mol. Opt. Phys. 44 015503
[25]	Wang C and Chen Q H 2013 Chin. Phys. B 22 040304
[26]	Zhou D, Lang A and Joynt R 2010 Quantum Inf. Process. 9 727
[27]	Joynt R, Zhou D and Wang Q H 2011 Int. J. Mod. Phys. B 25 2115

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