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

Technical Physics Letters

The effect of fluctuations on a single-contact interferometer: Quantum considerations

I. N. Askerzade

Published Aug 1, 2005• 3 citations
Publisher

Abstract

The effect of quantum fluctuations on a single-contact interferometer is considered. An expression for the “fluctuational” inductance, above which the superconducting current is effectively suppressed by quantum fluctuations, is obtained.
DOI
10.1134/1.2035364

Related papers

Suppression of interference by quantum fluctuations in a Josephson interferometer with a single small junction

I. N. Askerzade

The geometric inductance of a single-junction interferometer at which quantum fluctuations suppress interference and the Coulomb blockade of Cooper pairs is observed is found.

Technical Physics•Aug 1, 2002•0 citations

Quantum mechanical analysis of a single contact superconducting interferometer at low temperatures

Ya. S. Grinberg

The behavior of a single-contact superconducting interferometer at low temperatures, when its energy of zero point quantum vibrations ℏ(LC)−1/2 is comparable to the thermal energy kT, is studied. Hysteresis-free and hysteretic regimes of operation of the interferometer are examined. It is shown that taking into account quantum corrections leads to effects which, probably, can be observed experimentally.

Soviet Journal of Low Temperature Physics•Apr 1, 1982•0 citations

The threshold current of a balanced double-contact low-inductance interferometer

I. N. Askerzade

The dependence of the threshold current of a double-contact low-inductance interferometer on the capacitance of a Josephson contact and geometric inductance was found.

Technical Physics•Jul 1, 2000•0 citations

Effect of nonequilibrium phenomena in a superconducting point contact on the properties of a single-contact quantum interferometer

V. A. Khlus

The behavior of a superconducting ring incorporating a point contact, coupled inductively to an oscillatory circuit (hf SQUID), with the rate of change of the magnetic flux in the ring being comparable, to the inverse energy relaxation time of excitations in the superconductor τϵ−1, is examined. For T ∽ Tc the results of the microscopic theory of the nonstationary behavior of point contacts, in which the coupling between the phase difference and the current of the Josephson junction differs from the usual expression I = V/R + Icsinφ in the resistive model, are used. It is shown that the nonequilibrium behavior of a weak link for ω≳τϵ−1 significantly changes the amplitude–frequency and signal characteristics of the SQUID as compared with the case ωτϵ−1≪1, for which the results based on the resistive model are valid. The characteristics of the SQUID in the nonequilibrium situation are sensitive to the ratio between the size of the contact and the mean free path of electrons relative to scattering by impurities.

Soviet Journal of Low Temperature Physics•Jan 1, 1984•0 citations

The effect of alternating current on the current states of a quantum interferometer shunted by a superconducting inductance

S. I. Link, V. P. Koverya, A. V. Krevsun +1 more

The patterns of reversible changes in the critical current and discrete current states of a structure in the form of a superconducting quantum interferometer shunted by superconducting inductance, as a result of passing an alternating transport current through the structure and applying an external alternating magnetic field simultaneously with a direct transport current, was established. A new type of discrete stationary state was discovered during the transition of the interferometer to the resistive state caused by the combined action of direct and alternating transport currents.

arXiv:1812.00732•Low Temperature Physics•Nov 1, 2018•0 citations

Quantum Andreev interferometer in an environment

Y. M. Galperin, L. Y. Gorelik, N. I. Lundin +3 more

The influence of a noisy environment on coherent transport in Andreev states through a point contact between two superconductors is considered. The amount of dephasing is estimated for a microwave-activated quantum interferometer. Possibilities of experimentally investigating the coupling between a superconducting quantum point contact and its electromagnetic environment are discussed.

Physics-Uspekhi•Oct 1, 2001•3 citations
The behavior of a superconducting ring incorporating a point contact, coupled inductively to an oscillatory circuit (hf SQUID), with the rate of change of the magnetic flux in the ring being comparable, to the inverse energy relaxation time of excitations in the superconductor τϵ−1, is examined. For T ∽ Tc the results of the microscopic theory of the nonstationary behavior of point contacts, in which the coupling between the phase difference and the current of the Josephson junction differs from the usual expression I = V/R + Icsinφ in the resistive model, are used. It is shown that the nonequilibrium behavior of a weak link for ω≳τϵ−1 significantly changes the amplitude–frequency and signal characteristics of the SQUID as compared with the case ωτϵ−1≪1, for which the results based on the resistive model are valid. The characteristics of the SQUID in the nonequilibrium situation are sensitive to the ratio between the size of the contact and the mean free path of electrons relative to scattering by impurities.
The patterns of reversible changes in the critical current and discrete current states of a structure in the form of a superconducting quantum interferometer shunted by superconducting inductance, as a result of passing an alternating transport current through the structure and applying an external alternating magnetic field simultaneously with a direct transport current, was established. A new type of discrete stationary state was discovered during the transition of the interferometer to the resistive state caused by the combined action of direct and alternating transport currents.