Absence of a Dissipative Quantum Phase Transition in Josephson Junctions

被引：43

作者：

Murani, A. ^{[1
]}

Bourlet, N. ^{[1
]}

le Sueur, H. ^{[1
]}

Portier, F. ^{[1
]}

Altimiras, C. ^{[1
]}

Esteve, D. ^{[1
]}

Grabert, H. ^{[2
]}

Stockburger, J. ^{[3
,4
]}

Ankerhold, J. ^{[3
,4
]}

Joyez, P. ^{[1
]}

机构：

[1] Univ Paris Saclay, CNRS, CEA, SPEC, F-91191 Gif Sur Yvette, France

[2] Univ Freiburg, Phys Inst, Hermann Herder Str 3, D-79104 Freiburg, Germany

[3] Univ Ulm, Inst Complex Quantum Syst, D-89069 Ulm, Germany

[4] Univ Ulm, IQST, D-89069 Ulm, Germany

来源：

PHYSICAL REVIEW X | 2020年 / 10卷 / 02期

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

SUPERCONDUCTOR-INSULATOR TRANSITION; DYNAMICS; FLUCTUATIONS; LOCALIZATION; PERIODICITY; DIFFUSION; PARTICLE; CIRCUIT; DIAGRAM;

D O I：

10.1103/PhysRevX.10.021003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Half a century after its discovery, the Josephson junction has become the most important nonlinear quantum electronic component at our disposal. It has helped reshape the International System of Units around quantum effects and is used in scores of quantum devices. By itself, the use of Josephson junctions in volt metrology seems to imply an exquisite understanding of the component in every aspect. Yet, surprisingly, there have been long-standing subtle issues regarding the modeling of the interaction of a junction with its electromagnetic environment. Here, we find that a Josephson junction connected to a resistor does not become insulating beyond a given value of the resistance due to a dissipative quantum phase transition, as is commonly believed. Our work clarifies how this key quantum component behaves in the presence of a dissipative environment and provides a comprehensive and consistent picture, notably regarding the treatment of its phase.

引用

页数：19

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