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

Physical Review Letters

Frequency-Pulling Effects in Josephson Radiation

Marlan O. Scully, Patrick A. Lee

Published Jan 6, 1969• 27 citations
Publisher

Abstract

Using techniques developed in the quantum theory of the laser, we show that the frequency of the radiation emitted from a superconducting tunnel junction may be pulled slightly from $\frac{2eV}{\ensuremath{\hbar}}$ and present a physical discussion and numerical estimate of the effect.

DOI
10.1103/physrevlett.22.23

Related papers

Theory of a Josephson Oscillator

Michael J. Stephen

A quantum mechanical theory of superconducting tunnel junctions including noise is developed. The theory is applied to the calculation of the frequency pulling, linewidth of the radiation, and voltage power spectrum in the ac Josephson effect.

Physical Review Letters•Dec 9, 1968•73 citations

Superconducting lasers

Researchers at the University of Maryland in the US have discovered that arrays of superconducting devices can emit coherent radiation like a laser (P Barbara et al. 1999 Phys. Rev. Lett.82 1963). The devices, known as Josephson junctions, consist of two layers of superconductor separated by a narrow insulating gap. When a DC voltage is applied across the two superconducting layers, the devices can emit radiation as electrons tunnel through the junction.

Physics World•Apr 1, 1999•0 citations

A Far-Infrared Laser Study of Small-Area Superconducting Tunnel Junctions.

W. C. Danchi

Abstract : This document reports the first observations of photon-assisted quasiparticle tunneling and AC Josephson effect in superconducting tunnel junctions irradiated with far-infrared radiation.

•Oct 1, 1983•0 citations

Quantum susceptance and its effects on the high-frequency response of superconducting tunnel junctions

Qing Hu, C. A. Mears, P. L. Richards +1 more

We have made the first direct measurement of the quantum susceptance that arises from the nondissipative part of quasiparticle tunneling in a superconductor-insulator-superconductor tunnel junction. The junction is coupled to an antenna and a superconducting microstrip stub to form a resonator; the resonant frequency is determined from the response of the junction to broadband radiation from a Fourier-transform spectrometer. A 19% shift of the resonant frequency, from 73 to 87 GHz, is observed, which arises from the change of the quantum susceptance of the junction with dc bias voltage. This shift is in excellent agreement with calculations based on the Werthamer-Tucker theory, which includes the quantum susceptance. We also demonstrate that it is essential to include the quantum susceptance in our theoretical computation to explain the photon-assisted-tunneling steps, which have negative dynamic conductance. Such steps are observed when the junction is pumped at slightly below the resonant frequency of the capacitor and the stub. The quantum susceptance should exist in all tunnel devices whose nonlinear I-V characteristics are due to elastic tunneling.

Physical review. B, Condensed matter•Dec 1, 1990•18 citations

Frequency-Pulling Effects in Josephson Radiation

D. E. McCumber

Contrary to recent suggestions, cavity detuning per se does not modify the Josephson relation ${\ensuremath{\omega}}_{J}(V)=2e\frac{V}{\ensuremath{\hbar}}$, although it can produce measurable differences between the electrostatic and electrochemical potentials in a Josephson junction.

Physical Review Letters•Nov 24, 1969•16 citations

Josephson-type superconducting tunnel junctions as generators of microwave and submillimeter wave radiation

D. N. Langenberg, Douglas J. Scalapino, Barry N. Taylor

The use of Josephson-type superconducting tunnel junctions (two superconductors separated by a very thin insulating layer) as generators of radiation in the range 5 GHz to 1000 GHz is discussed. To this end, the results of recent experiments on the observation of X-band radiation from such junctions are presented, along with a complete discussion of the theory of such junctions. Their potential use as detectors, voltage sources, and harmonic multipliers is also discussed.

Proceedings of the IEEE•Jan 1, 1966•143 citations
Using techniques developed in the quantum theory of the laser, we show that the frequency of the radiation emitted from a superconducting tunnel junction may be pulled slightly from 2eV\ensuremathℏ\frac{2eV}{\ensuremath{\hbar}}\ensuremathℏ2eV​ and present a physical discussion and numerical estimate of the effect.
We have made the first direct measurement of the quantum susceptance that arises from the nondissipative part of quasiparticle tunneling in a superconductor-insulator-superconductor tunnel junction. The junction is coupled to an antenna and a superconducting microstrip stub to form a resonator; the resonant frequency is determined from the response of the junction to broadband radiation from a Fourier-transform spectrometer. A 19% shift of the resonant frequency, from 73 to 87 GHz, is observed, which arises from the change of the quantum susceptance of the junction with dc bias voltage. This shift is in excellent agreement with calculations based on the Werthamer-Tucker theory, which includes the quantum susceptance. We also demonstrate that it is essential to include the quantum susceptance in our theoretical computation to explain the photon-assisted-tunneling steps, which have negative dynamic conductance. Such steps are observed when the junction is pumped at slightly below the resonant frequency of the capacitor and the stub. The quantum susceptance should exist in all tunnel devices whose nonlinear I-V characteristics are due to elastic tunneling.