Macroscopic resonant tunneling in an rf-SQUID flux qubit

doi:10.1088/1674-1056/20/5/050316

Abstract We have observed the macroscopic resonant tunneling of magnetic flux between macroscopically distinct quantum states in a superconducting flux qubit. The dependences of the macroscopic resonant tunneling on the barrier height of the potential well, the flux bias and the initial state are investigated. Detailed measurements of the tunneling rate as a function of the flux bias reveal the feature of the quantum noise in the superconducting flux qubit.

Keywords: rf-SQUID macroscopic resonant tunneling quantum noise flux qubit

Received: 08 October 2010
Revised: 10 December 2010
Accepted manuscript online:

PACS:	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
	85.25.Dq	(Superconducting quantum interference devices (SQUIDs))
	03.67.Lx	(Quantum computation architectures and implementations)
	42.50.Lc	(Quantum fluctuations, quantum noise, and quantum jumps)

Fund: Project supported by the New Century Excellent Talents in University, China, the National Natural Science Foundation of China (Grant Nos. 11074114 and 10874074), and the National Basic Research Program of China (Grant No. 2011CBA00200).

Cite this article:

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) Macroscopic resonant tunneling in an rf-SQUID flux qubit 2011 Chin. Phys. B 20 050316

[1]	Makhlin Y, Schõn G and Shnirman A 2001 Rev. Mod. Phys. 73 357
[2]	Clarke J and Wilhelm F K 2008 Nature 453 1031
[3]	Astafiev O, Pashkin Y A, Nakamura Y, Yamamoto T and Tsai J S 2004 Phys. Rev. Lett. 93 267007
[4]	Yoshihara F, Harrabi K, Niskanen A O, Nakamura Y and Tsai J S 2006 Phys. Rev. Lett. 97 167001
[5]	Bialczak R C, McDermott R, Ansmann M, Hofheinz M, Katz N, Lucero E, Neeley M, O'Connell A D, Wang H, Cleland A N and Martinis J 2007 Phys. Rev. Lett. 99 187006
[6]	Yu Y, Zhu S, Sun G Z, Wen X D, Dong N, Chen J, Wu P H and Han S Y 2008 Phys. Rev. Lett. 101 157001
[7]	Lanting T, Berkley A J, Bumble B, Bunyk P, Fung A, Johansson J, Kaul A, Kleinsasser A, Ladizinsky E, Maibaum F, Harris R, Johnson M W, Tolkacheva E and Amin M H S 2009 Phys. Rev. B. 79 060509
[8]	McDermott R 2009 IEEE. Trans. Appl. Supercond. 19 2
[9]	Harris R, Johnson M W, Han S Y, Berkley A J, Johansson J, Bunyk P, Ladizinsky E, Govorkov S, Thom M C, Uchaikin S, Bumble B, Fung A, Kaul A, Kleinsasser A, Amin M H and Averin D V 2008 Phys. Rev. Lett. 101 117003
[10]	Lu W T, Wang S J and Zhang H 2010 Chin. Phys. B 19 020304
[11]	Sun G Z, Wen X D, Wang Y W, Cong S H, Chen J, Kang L, Xu W W, Yu Y, Han S Y and Wu P H 2009 Appl. Phys. Lett. 94 102502
[12]	Bennett D A, Longobardi L, Patel V, Chen W and Lukens J E 2007 Supercond. Sci. Technol. 20 S445
[13]	Amin M H S and Averin D V 2008 Phys. Rev. Lett. 100 19700 endfootnotesize

[1]	Deterministic remote state preparation of arbitrary three-qubit state through noisy cluster-GHZ channel Zhihang Xu(许智航), Yuzhen Wei(魏玉震), Cong Jiang(江聪), and Min Jiang(姜敏). Chin. Phys. B, 2022, 31(4): 040304.
[2]	Characterization of barrier-tunable radio-frequency-SQUID for Maxwell's demon experiment Gang Li(李刚), Suman Dhamala, Hao Li(李浩), Jian-She Liu(刘建设), Wei Chen(陈炜). Chin. Phys. B, 2018, 27(6): 068501.
[3]	Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving Jianxin Shi(史建新), Weiwei Xu(许伟伟), Guozhu Sun(孙国柱), Jian Chen(陈健), Lin Kang(康琳), Peiheng Wu(吴培亨). Chin. Phys. B, 2017, 26(4): 047402.
[4]	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.
[5]	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.
[6]	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.
[7]	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.
[8]	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.
[9]	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.
[10]	The difference in noise property between the Autler–Townes splitting medium and the electromagnetically induced transparent medium Li Zhong-Hua(李中华), Li Yuan(李媛), Dou Ya-Fang(豆亚芳), and Zhang Jun-Xiang(张俊香) . Chin. Phys. B, 2012, 21(3): 034204.
[11]	Quantum nondemolition measurements of a flux qubit coupled to a noisy detector Jiang Wei(姜伟), Yu Yang(于扬), and Wei Lian-Fu(韦联福) . Chin. Phys. B, 2011, 20(8): 080307.
[12]	Entanglement dynamics of two-qubit systems in different quantum noises Pan Chang-Ning(潘长宁), Li-Fei(李飞), Fang Jian-Shu(方见树), and Fang Mao-Fa(方卯发). Chin. Phys. B, 2011, 20(2): 020304.
[13]	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). Chin. Phys. B, 2010, 19(5): 057301.
[14]	Controlled decoherence of floating flux qubits Ji Ying-Hua(嵇英华) and Xu Lin(徐林). Chin. Phys. B, 2010, 19(11): 110305.
[15]	Relation between quantum NOT gate speed and asymmetry of the potential of RF-SQUID Ji Ying-Hua(嵇英华), Cai Shi-Hua(蔡十华), and Hu Ju-Ju(胡菊菊). Chin. Phys. B, 2008, 17(2): 440-444.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Macroscopic resonant tunneling in an rf-SQUID flux qubit

Cite this article:

Online attention