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
University of Campania Luigi Vanvitelli
Superconductors, oxides and other innovative materials and devices
D. Massarotti
University of Naples Federico II
Superconductors, oxides and other innovative materials and devices
D. Stornaiuolo
Superconductors, oxides and other innovative materials and devices
L. Galletti
University of Naples Federico II
Superconductors, oxides and other innovative materials and devices
G. Rotoli
University of Campania Luigi Vanvitelli
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
F. Tafuri
University of Campania Luigi Vanvitelli
Superconductors, oxides and other innovative materials and devices
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 109 5 050601Subject Categories
Physical Sciences
DOI
10.1103/PhysRevLett.109.050601