Thermal escape and macroscopic quantum tunneling from metastable state in three-junction flux qubit

[in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]

doi:10.3969/j.issn.1007-5461.2012.06.011

[4] Makhlin A J, Chakravarty S, Dorsey A T. Quantum-state engineering with Josephson-junction devices ［J］. Rev. Mod. Phys., 2001, 73(2): 357-400.

[5] Wang Zhen, Li Shaoxiong, Yu Yang, et al. Quantitative study of macroscopic quantum tunneling in a dc-SQUID: a system with two degrees of freedom ［J］. Phys. Rev. Lett., 2002 89(9): 098301.

[6] Sun Guozhu, Dong Ning, Mao Guangfeng, et al. Thermal escape from a metastable state in periodically driven Josephson junction ［J］. Phys. Rev. E, 2007, 75(2): 021107.

[7] Han Siyuan, Yu H F, Zhu X B, et al. Quantum and classical resonant escape of a strongly driven Josephson junction ［J］. Phys. Rev. B, 2010, 81(14): 1445181-1445189.

[8] Mooij J E, Orlando T P, Levitov L. Josephson persistent current qubit ［J］. Science, 1999, 285: 1036-1039.

[9] Orlando T P, Mooij J E, Tian Lin, et al. Superconducting persistent current qubit ［J］. Phys. Rev. B, 1999, 60(22): 15398-15413.

[11] Liu Yuxi, You J Q, Wei L F, et al. Optical selection rules and phase dependent adiabatic stata control in superconducting quantun circuit ［J］. Phys. Rev. Lett., 2005, 95(8): 087001.

[12] Tesche C D. A thermal activation model for noise in the dc SQUID ［J］. J. Low. Temp. Phys., 1981, 44: 119-147.

[13] Jacob E B, Bergman D J, Imry Y. Thermal activation from the fluxoid and voltage states of dc SQUID ［J］. J. Appl. Phys., 1983, 54(11): 6533-6542.

[14] Martinis J M, Devoret M H, Clarke J. Experimental tests for the quantum behavior of a macroscopic degree of freedom the phase difference across a Josephson junction ［J］. Phys. Rev. B, 1987, 35(10): 4682-4698.