Theory of two-dimensional macroscopic quantum tunneling in a Josephson junction coupled with an LC circuit
Paper in proceedings, 2009

We investigate classical thermal activation (TA) and macroscopic quantum tunneling (MQT) for a Josephson junction coupled with an LC circuit theoretically. The TA and MQT escape rate are calculated analytically by taking into account the two-dimensional nature of the classical and quantum phase dynamics. We find that the MQT escape rate is largely suppressed by the coupling to the LC circuit. On the other hand, this coupling gives rise to slight reduction of the TA escape rate. These results are relevant for the interpretation of a recent experiment on the MQT and TA phenomena in grain boundary YBCO Josephson junctions.

macroscopic quantum tunneling

Josephson junctions

superconductivity

Author

Shiro Kawabata

Japan Science and Technology Agency

National Institute of Advanced Industrial Science and Technology

Chalmers

Takeo Kato

University of Tokyo

Thilo Bauch

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

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 150 5 052105-

Subject Categories

Condensed Matter Physics

DOI

10.1088/1742-6596/150/5/052105

More information

Latest update

9/10/2018