Direct Transition from Quantum Escape to a Phase Diffusion Regime in YBaCuO Biepitaxial Josephson Junctions
Journal article, 2012

Dissipation encodes the interaction of a quantum system with the environment and regulates the activation regimes of a Brownian particle. We have engineered grain boundary biepitaxial YBaCuO junctions to drive a direct transition from a quantum activated running state to a phase diffusion regime. The crossover to the quantum regime is tuned by the magnetic field and dissipation is described by a fully consistent set of junction parameters. To unravel phase dynamics in moderately damped systems is of general interest for advances in the comprehension of retrapping phenomena and in view of quantum hybrid technology.

single

dynamics

dissipation

thermal-activation

return

decay

tunnel-junctions

zero-voltage state

qubit

Author

L. Longobardi

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

D. Massarotti

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

D. Stornaiuolo

Superconductors, oxides and other innovative materials and devices

L. Galletti

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

G. Rotoli

Università degli Studi della Campania Luigi Vanvitelli

Floriana Lombardi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

F. Tafuri

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 109 5 050601

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevLett.109.050601

More information

Latest update

4/11/2018