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

superconductivity

Josephson junctions

Författare

Shiro Kawabata

Chalmers University of Technology

National Institute of Advanced Industrial Science and Technology

Japan Science and Technology Agency

Takeo Kato

University of Tokyo

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 150 5 052105-

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/1742-6596/150/5/052105