Theoretical Model to Explain Excess of Quasiparticles in Superconductors

被引：28

作者：

Bespalov, Anton ^{[1
,2
]}

Houzet, Manuel ^{[1
,2
]}

Meyer, Julia S. ^{[1
,2
]}

Nazarov, Yuli V. ^{[3
]}

机构：

[1] Univ Grenoble Alpes, INAC PHELIQS, F-38000 Grenoble, France

[2] CEA, INAC PHELIQS, F-38000 Grenoble, France

[3] Delft Univ Technol, Kavli Inst NanoSci, Lorentzweg 1, NL-2628 CJ Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 11期

关键词：

PARITY LIFETIME; STATES; FLUCTUATIONS; QUBIT;

D O I：

10.1103/PhysRevLett.117.117002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Experimentally, the concentration of quasiparticles in gapped superconductors always largely exceeds the equilibrium one at low temperatures. Since these quasiparticles are detrimental for many applications, it is important to understand theoretically the origin of the excess. We demonstrate in detail that the dynamics of quasiparticles localized at spatial fluctuations of the gap edge becomes exponentially slow. This gives rise to the observed excess in the presence of a vanishingly weak nonequilibrium agent.

引用

页数：5

共 36 条

[21] Environment-Assisted Tunneling as an Origin of the Dynes Density of States [J].

Pekola, J. P. ;

Maisi, V. F. ;

Kafanov, S. ;

Chekurov, N. ;

Kemppinen, A. ;

Pashkin, Yu. A. ;

Saira, O. -P. ;

Mottonen, M. ;

Tsai, J. S. .

PHYSICAL REVIEW LETTERS, 2010, 105 (02)

[22] Magnetic-field-induced stabilization of nonequilibrium superconductivity in a normal-metal/insulator/superconductor junction [J].

Peltonen, J. T. ;

Muhonen, J. T. ;

Meschke, M. ;

Kopnin, N. B. ;

Pekola, J. P. .

PHYSICAL REVIEW B, 2011, 84 (22)

[23] Majorana qubit decoherence by quasiparticle poisoning [J].

Rainis, Diego ;

Loss, Daniel .

PHYSICAL REVIEW B, 2012, 85 (17)

[24] Efficiency of quasiparticle evacuation in superconducting devices [J].

Rajauria, Sukumar ;

Pascal, L. M. A. ;

Gandit, Ph ;

Hekking, F. W. J. ;

Pannetier, B. ;

Courtois, H. .

PHYSICAL REVIEW B, 2012, 85 (02)

[25]

Rammer J, 1998, Quantum Transport Theory

[26] Millisecond charge-parity fluctuations and induced decoherence in a superconducting transmon qubit [J].

Riste, D. ;

Bultink, C. C. ;

Tiggelman, M. J. ;

Schouten, R. N. ;

Lehnert, K. W. ;

DiCarlo, L. .

NATURE COMMUNICATIONS, 2013, 4

[27] Vanishing quasiparticle density in a hybrid Al/Cu/Al single-electron transistor [J].

Saira, O-P ;

Kemppinen, A. ;

Maisi, V. F. ;

Pekola, J. P. .

PHYSICAL REVIEW B, 2012, 85 (01)

[28] Subgap states in dirty superconductors and their effect on dephasing in Josephson qubits [J].

Silva, A ;

Ioffe, LB .

PHYSICAL REVIEW B, 2005, 71 (10)

[29]

Tauber UC, 2014, CRITICAL DYNAMICS: A FIELD THEORY APPROACH TO EQUILIBRIUM AND NON-EQUILIBRIUM SCALING BEHAVIOR, P1

[30] Tunable quasiparticle trapping in Meissner and vortex states of mesoscopic superconductors [J].

Taupin, M. ;

Khaymovich, I. M. ;

Meschke, M. ;

Mel'nikov, A. S. ;

Pekola, J. P. .

NATURE COMMUNICATIONS, 2016, 7

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