Enhanced macroscopic quantum tunneling in Bi2Sr2CaCu2O8+δ intrinsic Josephson-junction stacks

被引：134

作者：

Jin, XY ^{[1
]}

Lisenfeld, J ^{[1
]}

Koval, Y ^{[1
]}

Lukashenko, A ^{[1
]}

Ustinov, AV ^{[1
]}

Müller, P ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Phys 3, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.96.177003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated macroscopic quantum tunneling in Bi2Sr2CaCu2O8+delta intrinsic Josephson junctions at millikelvin temperatures using microwave irradiation. Measurements show that the escape rate for uniformly switching stacks of N junctions is about N-2 times higher than that of a single junction having the same plasma frequency. We argue that this gigantic enhancement of the macroscopic quantum tunneling rate in stacks is boosted by current fluctuations which occur in the series array of junctions loaded by the impedance of the environment.

引用

页数：4

共 25 条

[11] Microwave-induced thermal escape in Josephson junctions [J].

Gronbech-Jensen, N ;

Castellano, MG ;

Chiarello, F ;

Cirillo, M ;

Cosmelli, C ;

Filippenko, LV ;

Russo, R ;

Torrioli, G .

PHYSICAL REVIEW LETTERS, 2004, 93 (10) :107002-1

[12] Macroscopic quantum tunneling in a d-wave High-TC Bi2Sr2CaCu2O8+δ superconductor -: art. no. 107005 [J].

Inomata, K ;

Sato, S ;

Nakajima, K ;

Tanaka, A ;

Takano, Y ;

Wang, HB ;

Nagao, M ;

Hatano, H ;

Kawabata, S .

PHYSICAL REVIEW LETTERS, 2005, 95 (10)

[13] Macroscopic quantum tunneling and quasiparticle dissipation in d-wave superconductor Josephson junctions -: art. no. 132505 [J].

Kawabata, S ;

Kashiwaya, S ;

Asano, Y ;

Tanaka, Y .

PHYSICAL REVIEW B, 2004, 70 (13) :132505-1

[14] INTRINSIC JOSEPHSON EFFECTS IN BI2SR2CACU2O8 SINGLE-CRYSTALS [J].

KLEINER, R ;

STEINMEYER, F ;

KUNKEL, G ;

MULLER, P .

PHYSICAL REVIEW LETTERS, 1992, 68 (15) :2394-2397

[15] INTRINSIC JOSEPHSON EFFECTS IN HIGH-T-C SUPERCONDUCTORS [J].

KLEINER, R ;

MULLER, P .

PHYSICAL REVIEW B, 1994, 49 (02) :1327-1341

[16] EXPERIMENTAL TESTS FOR THE QUANTUM BEHAVIOR OF A MACROSCOPIC DEGREE OF FREEDOM - THE PHASE DIFFERENCE ACROSS A JOSEPHSON JUNCTION [J].

MARTINIS, JM ;

DEVORET, MH ;

CLARKE, J .

PHYSICAL REVIEW B, 1987, 35 (10) :4682-4698

[17] Rabi oscillations in a large Josephson-junction qubit [J].

Martinis, JM ;

Nam, S ;

Aumentado, J ;

Urbina, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (11) :1-117901

[18] ENERGY-LEVEL QUANTIZATION IN THE ZERO-VOLTAGE STATE OF A CURRENT-BIASED JOSEPHSON JUNCTION [J].

MARTINIS, JM ;

DEVORET, MH ;

CLARKE, J .

PHYSICAL REVIEW LETTERS, 1985, 55 (15) :1543-1546

[19] Simultaneous state measurement of coupled Josephson phase qubits [J].

McDermott, R ;

Simmonds, RW ;

Steffen, M ;

Cooper, KB ;

Cicak, K ;

Osborn, KD ;

Oh, S ;

Pappas, DP ;

Martinis, JM .

SCIENCE, 2005, 307 (5713) :1299-1302

[20] Pairing symmetry in cuprate superconductors [J].

Tsuei, CC ;

Kirtley, JR .

REVIEWS OF MODERN PHYSICS, 2000, 72 (04) :969-1016

← 1 2 3 →