Intrinsic Quantum Dissipation in Superconducting Weak Links

Artem V. Galaktionov; Dmitry S. Golubev; Andrei D. Zaikin

doi:10.1007/s10948-017-4318-8

Intrinsic Quantum Dissipation in Superconducting Weak Links

Artem V. Galaktionov^*, Dmitry S. Golubev, Andrei D. Zaikin

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

We evaluate the frequency spectrum for an intrinsic quantum dissipative environment for the Josephson phase φ formed by subgap Andreev bound states in superconducting weak links. We also analyze the problem of macroscopic quantum tunneling (MQT) of φ in highly transparent weak links and identify several MQT regimes. Within the exponential accuracy, we derive the expression for the supercurrent quantum decay rate both at low temperatures and in the vicinity of the quantum-to-classical crossover.

Original language	English
Pages (from-to)	715–721
Number of pages	7
Journal	Journal of Superconductivity and Novel Magnetism
Volume	31
Issue number	3
DOIs	https://doi.org/10.1007/s10948-017-4318-8
Publication status	Published - 2018
MoE publication type	A1 Journal article-refereed

Keywords

Dissipation
Josephson effect
Macroscopic quantum tunneling
Superconductivity

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10.1007/s10948-017-4318-8

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abstract = "We evaluate the frequency spectrum for an intrinsic quantum dissipative environment for the Josephson phase φ formed by subgap Andreev bound states in superconducting weak links. We also analyze the problem of macroscopic quantum tunneling (MQT) of φ in highly transparent weak links and identify several MQT regimes. Within the exponential accuracy, we derive the expression for the supercurrent quantum decay rate both at low temperatures and in the vicinity of the quantum-to-classical crossover.",

keywords = "Dissipation, Josephson effect, Macroscopic quantum tunneling, Superconductivity",

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AU - Golubev, Dmitry S.

AU - Zaikin, Andrei D.

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N2 - We evaluate the frequency spectrum for an intrinsic quantum dissipative environment for the Josephson phase φ formed by subgap Andreev bound states in superconducting weak links. We also analyze the problem of macroscopic quantum tunneling (MQT) of φ in highly transparent weak links and identify several MQT regimes. Within the exponential accuracy, we derive the expression for the supercurrent quantum decay rate both at low temperatures and in the vicinity of the quantum-to-classical crossover.

AB - We evaluate the frequency spectrum for an intrinsic quantum dissipative environment for the Josephson phase φ formed by subgap Andreev bound states in superconducting weak links. We also analyze the problem of macroscopic quantum tunneling (MQT) of φ in highly transparent weak links and identify several MQT regimes. Within the exponential accuracy, we derive the expression for the supercurrent quantum decay rate both at low temperatures and in the vicinity of the quantum-to-classical crossover.

KW - Dissipation

KW - Josephson effect

KW - Macroscopic quantum tunneling

KW - Superconductivity

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DO - 10.1007/s10948-017-4318-8

M3 - Article

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JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 3

ER -

Intrinsic Quantum Dissipation in Superconducting Weak Links

Abstract

Keywords

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