Please wait a minute...
Chin. Phys. B, 2010, Vol. 19(5): 057301    DOI: 10.1088/1674-1056/19/5/057301
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

The initial decoherence of the mesoscopic Josephson junction flux qubit

Su Jie(苏杰), Wang Ji-Suo(王继锁), Zhang Xiao-Yan(张晓燕), and Liang Bao-Long(梁宝龙)
School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
Abstract  For a mesoscopic radio frequency superconducting quantum interference device (rfSQUID), at a degeneracy point, the system reduces to a quantum two-state system which can be used as a flux qubit. When the noise environment is equivalent to a harmonic oscillators bath, by virtue of an operator-norm measure for the short time decoherence, this paper investigates the initial decoherence of the flux qubit operating in the ohmic noise environment and illustrates its property by means of the numerical evaluation.
Keywords:  mesoscopic rfSQUID      flux qubit      short-time decoherence  
Received:  07 April 2009      Revised:  10 August 2009      Accepted manuscript online: 
PACS:  85.25.Dq (Superconducting quantum interference devices (SQUIDs))  
  03.67.Lx (Quantum computation architectures and implementations)  
  85.25.Cp (Josephson devices)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No.~10574060) and the Natural Science Foundation of Shandong Province of China (Grant No.~Y2008R23).

Cite this article: 

Su Jie(苏杰), Wang Ji-Suo(王继锁), Zhang Xiao-Yan(张晓燕), and Liang Bao-Long(梁宝龙) The initial decoherence of the mesoscopic Josephson junction flux qubit 2010 Chin. Phys. B 19 057301

[1] Makhlin Y, Sch\"{on G and Shnirman A 2001 Rev. Mod. Phys. 73 357
[2] DiVincenzo D P arXiv:quant-ph/0002077v3
[3] Harlingen D J V, Robertson T L, Plourde B L T, Reichardt P A, Crane T A and Clarke J 2004 Phys. Rev. B 70 064517
[4] Martinis J M, Nam S, Aumentado J, Lang K M and Urbina C 2003 Phys. Rev. B 67 094510
[5] Martinis J M, Cooper K B, McDermott R, Steffen M, Ansmann M, Osborn K D, Cicak K, Oh S, Pappas D P, Simmonds R W and Yu C C 2005 Phys. Rev. Lett. 95 210503
[6] Yoshihara F, Harrabi K, Niskanen A O, Nakamura Y and Tsai J S 2006 Phys. Rev. Lett. 97 167001
[7] Tolkunov D and Privman V 2004 Phys. Rev. A 69 062309
[8] Liang X T and Xiong Y J 2004 Phys. Lett. A 332 8
[9] Fedichkin L, Fedorov A and Privman V 2004 Phys. Lett. A 328 87
[10] Liang B L, Wang J S, Fan H Y and Meng X G 2008 Chin. Phys. B 17 697
[11] Liang B L and Wang J S 2007 Chin. Phys. 16 3097
[12] Su J, Wang J S, Liang B L and Zhang X Y 2009 Chin. Phys. Lett. 26 017302
[13] Shnirman A, Makhlin Y and Sch\"{on G 2002 Phys. Scr. T102 147
[14] Bertet P, Chiorescu I, Burkard G, Semba K, Harmans C J P M, DiVincenzo D P and Mooij J E 2005 Phys. Rev. Lett. 95 257002
[15] Privman V 2003 J. Stat. Phys. 110 957
[16] Fedichkin L, Fedorov A and Privman V 2003 Proc. SPIE 5105 243
[17] Deppe F, Mariantoni M, Menzel E P, Saito S, Kakuyanagi K, Tanaka H, Meno T, Semba K, Takayanagi H and Gross R 2007 Phys. Rev. B 76 214503
[1] Creating nitrogen–vacancy ensembles in diamond for coupling with flux qubit
Ya-Rui Zheng(郑亚锐), Jian Xing(邢健), Yan-Chun Chang(常彦春), Zhi-Guang Yan(闫智广), Hui Deng(邓辉), Yu-Lin Wu(吴玉林), Li Lü(吕力), Xin-Yu Pan(潘新宇), Xiao-Bo Zhu(朱晓波), Dong-Ning Zheng(郑东宁). Chin. Phys. B, 2017, 26(2): 020305.
[2] Design of a gap tunable flux qubit with FastHenry
Naheed Akhtar, Yarui Zheng(郑亚锐), Mudassar Nazir, Yulin Wu(吴玉林), Hui Deng(邓辉), Dongning Zheng(郑东宁), Xiaobo Zhu(朱晓波). Chin. Phys. B, 2016, 25(12): 120305.
[3] Spectroscopy and coherent manipulation of single and coupled flux qubits
Wu Yu-Lin (吴玉林), Deng Hui (邓辉), Huang Ke-Qiang (黄克强), Tian Ye (田野), Yu Hai-Feng (于海峰), Xue Guang-Ming (薛光明), Jin Yi-Rong (金贻荣), Li Jie (李洁), Zhao Shi-Ping (赵士平), Zheng Dong-Ning (郑东宁). Chin. Phys. B, 2013, 22(9): 090312.
[4] Tuning rf-SQUID flux qubit system's potential with magnetic flux bias
Hua Tao (花涛), Xu Wei-Wei (许伟伟), Shi Jian-Xin (史建新), An De-Yue (安德越), Sun Guo-Zhu (孙国柱), Yu Yang (于扬), Wu Pei-Heng (吴培亨). Chin. Phys. B, 2012, 21(9): 098501.
[5] Aharonov–Anandan phase gate in sub Hilbert space of a coupling flux qubits system
Zheng Guo-Lin(郑国林), Deng Hui(邓辉), Wu Yu-Lin(吴玉林), Wang Xin-Qiang(王新强), Chen Ying-Fei(陈莺飞), and Zheng Dong-Ning(郑东宁) . Chin. Phys. B, 2012, 21(7): 070310.
[6] Flux qubit with a large loop size and tunable Josephson junctions
Deng Hui(邓辉), Yu Hai-Feng(于海峰), Xue Guang-Ming(薛光明), Tian Ye(田野), Ren Jian-Kun(任建坤), Wu Yu-Lin(吴玉林), Huang Ke-Qiang(黄克强), Zhao Shi-Ping(赵士平), and Zheng Dong-Ning(郑东宁) . Chin. Phys. B, 2012, 21(4): 040307.
[7] Macroscopic resonant tunneling in an rf-SQUID flux qubit
Cong Shan-Hua (丛山桦), Wang Yi-Wen (王轶文), Sun Guo-Zhu (孙国柱), Chen Jian (陈健), Yu Yang (于扬), Wu Pei-Heng (吴培亨). Chin. Phys. B, 2011, 20(5): 050316.
[8] Controlled decoherence of floating flux qubits
Ji Ying-Hua(嵇英华) and Xu Lin(徐林). Chin. Phys. B, 2010, 19(11): 110305.
No Suggested Reading articles found!