GENERAL |
|
|
|
|
Control of the Entanglement between Two Josephson Charge Qubits |
LIAO Qing-Hong1, FANG Guang-Yu1, WANG Ji-Cheng1, AHMAD Muhammad Ashfaq2, LIU Shu-Tian1**
|
1Department of Physics, Harbin Institute of Technology, Harbin 150001
2Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan |
|
Cite this article: |
LIAO Qing-Hong, FANG Guang-Yu, WANG Ji-Cheng et al 2011 Chin. Phys. Lett. 28 060307 |
|
|
Abstract We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction. The time evolution of entanglement between two Josephson charge qubits is investigated by employing the concurrence. We examine the influence of the initial mean photon number, the relative phase and the amplitude of the two qubits on the time evolution of entanglement. The results show that the initial mean photon number, the relative phase and the amplitude of the two qubits play an important role in the evolution of entanglement.
|
Keywords:
03.67.Bg
85.25.Cp
|
|
Received: 12 December 2010
Published: 29 May 2011
|
|
PACS: |
03.67.Bg
|
(Entanglement production and manipulation)
|
|
85.25.Cp
|
(Josephson devices)
|
|
|
|
|
[1] Peres A 1993 Quantum Theory: Concepts and Methods (Dordrecht: Kluwer Academic)
[2] Ekert A 1991 Phys. Rev. Lett. 67 661
[3] Bennett C H, Brassard G, Crepeau C, Jozsa R, Peres A and Wootters W K 1993 Phys. Rev. Lett. 70 1895
[4] Bennett C H and Wiesner S J 1993 Phys. Rev. Lett. 69 2881
[5] Lieb E H and Seiringer R 2005 Phys. Rev. A 71 062309
[6] Biswas A and Agarwal G S 2003 Phys. Rev. A 68 054303
[7] Turchette Q A, Wood C S, King B E, Myatt C J, Leibfried D, Itano W M, Monroe C and Wineland D J 1998 Phys. Rev. Lett. 81 3631
[8] Julsgaard B, Kozhekin A and Polzik E S 2001 Nature 413 400
[9] Lukin M D, Fleischhauer M, Cote R, Duan L M, Jaksch D, Cirac J I and Zoller P 2001 Phys. Rev. Lett. 87 037901
[10] Aspect A, Grangier P and Roger G 1981 Phys. Rev. Lett. 47 460
[11] Makhlin Y, Schön G and Shnirman A 2001 Rev. Mod. Phys. 73 357
[12] Martinis J M, Nam S, Aumentado J and Urbina C 2002 Phys. Rev. Lett. 89 117901
[13] Chiorescu I, Nakamura Y, Harmans C J P M and Mooij J E 2003 Science 299 1869
[14] Blais A, van den Brink A M and Zagoskin A M 2003 Phys. Rev. Lett. 90 127901
[15] Berkley A J, Xu H, Ramos R C, Gubrud M A, Strauch F W, Johnson P R, Anderson J R, Dragt A J, Lobb C J and Wellstood F C 2003 Science 300 1548
[16] Pashkin Y A, Yamamoto T, Astafiev O, Nakamura Y and Tsai J S 2003 Nature 421 823
[17] He G P, Zhu S L, Wang Z D and Li H Z 2003 Phys. Rev. A 68 012315
[18] You J Q and Nori F 2003 Phys. Rev. B 68 064509
[19] Song K H 2009 Chin. Phys. Lett. 26 120302
[20] Pashkin Y A, Tilma T, Averin D V, Astafiev O, Yamamoto T, Nakamura Y, Nori F and Tsai J S 2003 Int. J. Quantum. Inf. 1 421
[21] Liao Q H, Fang G Y, Wang Y Y, Ahmad M A and Liu S T 2010 Chin. Phys. Lett. 27 070304
[22] Kim M S, Lee J Y, Ahn D and Knight P L 2002 Phys. Rev. A 65 040101
[23] Pashkin Y A, Yamamoto T, Astafiev O, Nakamura Y, Averin D V, Tilma T, Nori F and Tsai J S 2005 Physica C 426 1552
[24] Rodrigues D A, Jarvis C E A, Gyorffy B L, Spiller T P and Annett J F 2008 J. Phys.: Condens. Matter 20 075211
[25] Jaynes E T and Cummings F W 1963 Proc. IEEE 51 89
[26] Shore B W and Knight P L 1993 J. Mod. Opt. 40 1195
[27] He X L, Liu Y X, You J Q and Nori F 2007 Phys. Rev. A 76 022317
[28] Wootters W K 1998 Phys. Rev. Lett. 80 2245
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|