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

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