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.
decay
dynamics
dissipation
zero-voltage state
qubit
thermal-activation
tunnel-junctions
single
return
Author
L. Longobardi
Superconductors, oxides and other innovative materials and devices
Università degli Studi della Campania Luigi Vanvitelli
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
Superconductors, oxides and other innovative materials and devices
Universita degli Studi di Napoli Federico II
G. Rotoli
Università degli Studi della Campania Luigi Vanvitelli
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
F. Tafuri
Superconductors, oxides and other innovative materials and devices
Università degli Studi della Campania Luigi Vanvitelli
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 109 5 050601Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1103/PhysRevLett.109.050601