Work

Two-dimensional Macroscopic Quantum Dynamics in Ybco Josephson Junctions

Year: 2009

Type: article

Abstract: We theoretically study classical thermal activation (TA) and macroscopic quantum tunneling (MQT) for a YBa2Cu3O7-δ( YBCO ) Josephson junction coupled with an LC circuit. The TA and MQT escape rate are calculated 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 leads to the 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 YBCO bi-epitaxial Josephson junctions.

Source: International Journal of Modern Physics B

DOI: 10.1142/s0217979209063481

Authors: SHIRO KAWABATA, TAKEO KATO, FLORIANA LOMBARDI, THILO BAUCH

Institutions: Japan Science and Technology Agency, Chalmers University of Technology, National Institute of Advanced Industrial Science and Technology, The University of Tokyo

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Award: Path-integral Monte Carlo study of dynamic response in mesoscopic devices