Multiphoton transitions between energy levels in a current-biased Josephson tunnel junction

被引:95
作者
Wallraff, A [1 ]
Duty, T [1 ]
Lukashenko, A [1 ]
Ustinov, AV [1 ]
机构
[1] Univ Erlangen Nurnberg, Inst Phys 3, D-91058 Erlangen, Germany
关键词
D O I
10.1103/PhysRevLett.90.037003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The escape of a current-biased Josephson tunnel junction from the zero-voltage state in the presence of weak microwave radiation is investigated experimentally at low temperatures. The measurements of the junction switching current distribution indicate the macroscopic quantum tunneling of the phase below a crossover temperature of T-star approximate to 280 mK. At temperatures below T-star we observe both single-photon and multiphoton transitions between the junction energy levels by applying microwave radiation in the frequency range between 10 and 38 GHz to the junction. These observations reflect the anharmonicity of the junction potential containing only a small number of levels.
引用
收藏
页数:4
相关论文
共 26 条
[1]   VOLTAGE DUE TO THERMAL NOISE IN DC JOSEPHSON EFFECT [J].
AMBEGAOKAR, V ;
HALPERIN, BI .
PHYSICAL REVIEW LETTERS, 1969, 22 (25) :1364-+
[2]   PARAMETRIC-EXCITATION OF PLASMA-OSCILLATIONS IN A JOSEPHSON TUNNEL JUNCTION [J].
BAK, CK ;
KOFOED, B ;
PEDERSEN, NF ;
SAERMARK, K .
JOURNAL OF APPLIED PHYSICS, 1975, 46 (02) :886-889
[3]   Quantum information and computation [J].
Bennett, CH ;
DiVincenzo, DP .
NATURE, 2000, 404 (6775) :247-255
[4]   Prospects for quantum coherent computation using superconducting electronics [J].
Bocko, MF ;
Herr, AM ;
Feldman, MJ .
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1997, 7 (02) :3638-3641
[5]   TRANSITION FROM QUANTUM TO CLASSICAL DISSIPATION IN THE PROBLEM OF ESCAPE FROM A METASTABLE WELL - APPLICATION TO JOSEPHSON-JUNCTIONS [J].
CHOW, KS ;
AMBEGAOKAR, V .
PHYSICAL REVIEW B, 1988, 38 (16) :11168-11176
[6]   MEASUREMENT OF THE EFFECT OF MODERATE DISSIPATION ON MACROSCOPIC QUANTUM TUNNELING [J].
CLELAND, AN ;
MARTINIS, JM ;
CLARKE, J .
PHYSICAL REVIEW B, 1988, 37 (10) :5950-5953
[7]  
COHENTANNOUDJI C, 1977, QUANTUM MECH, V2
[8]   STUDY OF JOSEPHSON PLASMA RESONANCE [J].
DAHM, AJ ;
DENENSTEIN, A ;
FINNEGAN, TF ;
LANGENBERG, DN ;
SCALAPINO, DJ .
PHYSICAL REVIEW LETTERS, 1968, 20 (16) :859-+
[9]  
DEVORET MH, 1992, QUANTUM TUNNELING CO
[10]   Quantum superposition of distinct macroscopic states [J].
Friedman, JR ;
Patel, V ;
Chen, W ;
Tolpygo, SK ;
Lukens, JE .
NATURE, 2000, 406 (6791) :43-46