Decay in an asymmetric SQUID
Superconductivity
2010-09-20 v1
Abstract
Quantum tunneling in an asymmetric (with strongly different capacitances) SQUID is studied. Since capacitances play a role of masses one phase, related to a large mass, becomes "heavy" and remains always a constant in a tunneling process. Tunneling in an asymmetric SQUID becomes one-dimensional with a condition of optimization of tunneling probability with respect to a value of the "heavy" phase. An unusual temperature dependence of the tunneling probability is obtained. It has a finite slope at zero temperature and a transition between thermally assisted tunneling and pure activation can be not smooth depending on current through a SQUID.
Cite
@article{arxiv.1009.3309,
title = {Decay in an asymmetric SQUID},
author = {J. P. Palomares Baez and B. Ivlev},
journal= {arXiv preprint arXiv:1009.3309},
year = {2010}
}