Посилання:Escape dynamics in moderately damped
Josephson junctions (Review Article) / D. Massarotti, L. Longobardi, L. Galletti, D. Stornaiuolo, D. Montemurro,G. Pepe, G. Rotoli, A. Barone, F. Tafuri // Физика низких температур. — 2012. — Т. 38, № 4. — С. 336–347. — Бібліогр.: 85 назв. — англ.
Підтримка:This contribution initially intended to celebrate 50 years
from the discovery of the Josephson effect, also stands
now as the last paper of our friend and maestro Antonio
Barone. Antonio passed away before He could see the final
line of the work, that however responds to the common
initial planning. This manuscript is now also in his honor,
touching one of his favorite topics, macroscopic quantum
phenomena in Josephson junctions. This work is supported
by MIUR PRIN 2009 under the project SuFET based on
nanowires and HTS. We also acknowledge partial support
by STREP MIDAS, Macroscopic Interference Devices for
atomic and Solid State Physics: Quantum Control of Supercurrents
and by a Marie Curie International Reintegration
Grant No. 248933 hybMQC within the 7th European
Community Framework Programme.
The Josephson effect is a privileged access to the macroscopic quantum nature of superconductors. We review
some ideas and experimental techniques on macroscopic quantum decay phenomena occurring in Josephson
structures. The attention is mainly addressed to intermediate levels of dissipation which characterize a large
majority of low critical current Josephson devices and are therefore an avoidable consequence of nanotechnology
applied more and more to Josephson devices. Phase diffusion phenomena take over thermal activation in
some temperature ranges also affecting the transition to macroscopic quantum tunneling, enriching the phase diagram
mostly defined by the Josephson energy, the temperature and the level of dissipation.