Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

The European Physical Journal B

Quantum dynamics of tunneling between superconductors: Microscopic theory rederived via an oscillator model

Vinay Ambegaokar, Ulrich Eckern

Published Jun 1, 1987• 20 citations
Publisher
DOI
10.1007/bf01307298

Related papers

Microscopic Tunneling Model of Nb–AlN–NbN Josephson Flux-Flow Oscillator

D. R. Gulevich, Lyudmila V. Filippenko, V. P. Koshelets

arXiv:1809.01642•Journal of Low Temperature Physics•Dec 5, 2018•10 citations

Superconductivity and Quantum Mechanics

D. E. Thomsen

Science News•Jun 6, 1987•3 citations

Quantum dynamics of a superconducting tunnel junction

Ulrich Eckern, Gerd Schön, Vinay Ambegaokar

Basing our model and method on the microscopic theory we formulate a quantum-mechanical description for the relevant variable in a superconducting tunnel junction, i.e., the phase difference across the junction. The quasiparticle degrees of freedom are responsible for dissipation and noise in the system. Because of the discreteness of the charge-transfer process, the noise is shot noise. The energy gaps in the superconductors lead to further interesting features. We discuss the consequences of these physical effects on macroscopic quantum phenomena.

Physical review. B, Condensed matter•Dec 1, 1984•355 citations

MACROSCOPIC QUANTUM TUNNELING IN HIGH-TC SUPERCONDUCTOR JOSEPHSON JUNCTIONS

Shiro Kawabata

Foundations of Quantum Mechanics in the Light of New Technology•Jun 1, 2006•0 citations

Theory of ac Josephson Effect in Superfluid Helium

T. Kebukawa, Shosuke Sasaki

A microscopic theory of the ac Josephson effect in superfluid helium is proposed on the basis of the Heisenberg equation of the dressed-boson operators. The equation is solved exactly. The interference of the two eigen-oscillations in the exact solution produces the Josephson oscillation. It is verified that the oscillation occurs even when the quantum fluctuation of the relative phase is infinitely large. On the basis of these results, we propose an experiment to detect the tunnelling effect of the dressed-bosons. The formulation of this paper can be applied to the Josephson effect in superconductor.

Journal of the Physical Society of Japan•Feb 15, 1990•1 citation

Quantum Dynamics of Tunneling between Superconductors

Vinay Ambegaokar, Ulrich Eckern, Gerd Schön

A functional-integral formulation is used to treat the quantum dynamics of a microscopic model of a Josephson junction, including the dissipative effects of quasiparticle tunneling. The calculation is carried to a point where it makes contact with, and therefore substantiates, recent work by Caldeira and Leggett in which the system is treated by analogy with the quantum Brownian motion of a massive particle coupled to a phenomenological heat bath.

Physical Review Letters•Jun 21, 1982•445 citations
Basing our model and method on the microscopic theory we formulate a quantum-mechanical description for the relevant variable in a superconducting tunnel junction, i.e., the phase difference across the junction. The quasiparticle degrees of freedom are responsible for dissipation and noise in the system. Because of the discreteness of the charge-transfer process, the noise is shot noise. The energy gaps in the superconductors lead to further interesting features. We discuss the consequences of these physical effects on macroscopic quantum phenomena.
A microscopic theory of the ac Josephson effect in superfluid helium is proposed on the basis of the Heisenberg equation of the dressed-boson operators. The equation is solved exactly. The interference of the two eigen-oscillations in the exact solution produces the Josephson oscillation. It is verified that the oscillation occurs even when the quantum fluctuation of the relative phase is infinitely large. On the basis of these results, we propose an experiment to detect the tunnelling effect of the dressed-bosons. The formulation of this paper can be applied to the Josephson effect in superconductor.