Collapse of thermal activation in moderately damped Josephson junctions -: art. no. 157002

被引：70

作者：

Krasnov, VM ^{[1
]}

Bauch, T

Intiso, S

Hürfeld, E

Akazaki, T

Takayanagi, H

Delsing, P

机构：

[1] Stockholm Univ, Dept Phys, Albanova Univ Ctr, SE-10691 Stockholm, Sweden

[2] Chalmers Univ Technol, Dept Microtechnol & Nanosci, SE-41296 Gothenburg, Sweden

[3] NTT Corp, Basic Res Labs, Atsugi, Kanagawa 24301, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.95.157002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study switching current statistics in moderately damped Nb-InAs-Nb and intrinsic Bi2Sr2CaCu2O8+delta Josephson junctions. A paradoxical collapse of thermal activation with increasing temperature is reported and explained by the interplay of two conflicting consequences of thermal fluctuations, which can both assist in premature escape and help in retrapping back into the stationary state. We analyze the influence of dissipation on the thermal escape by tuning damping with a gate voltage, magnetic field, temperature, and an in situ capacitor.

引用

页数：4

共 28 条

[1] Observation of enhanced thermal noise due to multiple Andreev reflection in ballistic InGaAs-based superconducting weak links [J].

Akazaki, T ;

Nakano, H ;

Nitta, J ;

Takayanagi, H .

APPLIED PHYSICS LETTERS, 2005, 86 (13) :1-3

[2] Correlated quantization of supercurrent and conductance in a superconducting quantum point contact -: art. no. 174502 [J].

Bauch, T ;

Hürfeld, E ;

Krasnov, VM ;

Delsing, P ;

Takayanagi, H ;

Akazaki, T .

PHYSICAL REVIEW B, 2005, 71 (17)

[3] LIFETIME OF OSCILLATORY STEADY-STATES [J].

BENJACOB, E ;

BERGMAN, DJ ;

MATKOWSKY, BJ ;

SCHUSS, Z .

PHYSICAL REVIEW A, 1982, 26 (05) :2805-2816

[4] Entangled macroscopic quantum states in two superconducting qubits [J].

Berkley, AJ ;

Xu, H ;

Ramos, RC ;

Gubrud, MA ;

Strauch, FW ;

Johnson, PR ;

Anderson, JR ;

Dragt, AJ ;

Lobb, CJ ;

Wellstood, FC .

SCIENCE, 2003, 300 (5625) :1548-1550

[5] Switching dynamics of Nb/AlOx/Nb Josephson junctions: Measurements for an experiment of macroscopic quantum coherence [J].

Castellano, MG ;

Leoni, R ;

Torrioli, G ;

Chiarello, F ;

Cosmelli, C ;

Costantini, A ;

DiambriniPalazzi, G ;

Carelli, P ;

Cristiano, R ;

Frunzio, L .

JOURNAL OF APPLIED PHYSICS, 1996, 80 (05) :2922-2928

[6] Coherent dynamics of a flux qubit coupled to a harmonic oscillator [J].

Chiorescu, I ;

Bertet, P ;

Semba, K ;

Nakamura, Y ;

Harmans, CJPM ;

Mooij, JE .

NATURE, 2004, 431 (7005) :159-162

[7] Thermal fluctuations in ultrasmall intrinsic Josephson junctions -: art. no. 014506 [J].

Franz, A ;

Koval, Y ;

Vasyukov, D ;

Müller, P ;

Schneidewind, H ;

Ryndyk, DA ;

Keller, J ;

Helm, C .

PHYSICAL REVIEW B, 2004, 69 (01)

[8] ORIGIN OF HYSTERESIS IN IV CURVES OF POINT-CONTACT JUNCTIONS [J].

FULTON, TA ;

DUNKLEBE.LN .

JOURNAL OF APPLIED PHYSICS, 1974, 45 (05) :2283-2285

[9] QUANTUM DECAY-RATES FOR DISSIPATIVE SYSTEMS AT FINITE TEMPERATURES [J].

GRABERT, H ;

OLSCHOWSKI, P ;

WEISS, U .

PHYSICAL REVIEW B, 1987, 36 (04) :1931-1951

[10]

HANGGI P, 1990, REV MOD PHYS, V62, P251, DOI 10.1103/RevModPhys.62.251

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