Observation of Transition from Escape Dynamics to Underdamped Phase Diffusion in a Josephson Junction
J. M. Kivioja, T. E. Nieminen, J. Claudon, O. Buisson, F. W. J. Hekking, J. P. Pekola
DOI 10.1103/PhysRevLett.94.247002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have investigated the dynamics of underdamped Josephson junctions with a relatively small Josephson coupling EJ. In addition to the usual crossover between macroscopic quantum tunneling and thermally activated (TA) behavior we observe, for the first time, the transition from TA behavior to underdamped phase diffusion. Above the crossover temperature, the threshold for switching into the finite-voltage state becomes extremely sharp. We propose a (T, EJ) phase diagram with various regimes and show that for a proper description of it, dissipation and level quantization in a metastable well are crucial.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Revisiting Dissipation-Driven Phase Transition in a Josephson Junction
similarity 0.98Diego Subero et al.
Source status unknown — claims are unverified
Evidence for coherent quantum phase slips across a Josephson junction array
similarity 0.97Vladimir E. Manucharyan et al.
Source status unknown — claims are unverified
Direct Observation of Dynamical Bifurcation between Two Driven Oscillation States of a Josephson Junction
similarity 0.97I. Siddiqi et al.
Source status unknown — claims are unverified
Escape from a zero-current state in a one-dimensional array of Josephson junctions
similarity 0.96K. Andersson & D. B. Haviland
Source status unknown — claims are unverified
Thermal Activation above a Dissipation Barrier: Switching of a Small Josephson Junction
similarity 0.96D. Vion et al.
Source status unknown — claims are unverified
Emission and Absorption Asymmetry in the Quantum Noise of a Josephson Junction
similarity 0.96P.-M. Billangeon et al.
Source status unknown — claims are unverified