Two-dimensional macroscopic quantum dynamics in YBCO Josephson junctions

Abstract

We theoretically study classical thermal activation (TA) and macroscopic quantum tunneling (MQT) for a 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.

9 pages, 2 figures

References in corpus (8)

• Macroscopic quantum tunneling in a d-wave high-Tc superconductor
• Enhanced Macroscopic Quantum Tunneling in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson Junction Stacks
• Switching Dynamics of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson junctions: Macroscopic Quantum Tunneling and Self-Heating Effect
• Theory of Macroscopic Quantum Tunneling in High-T_c c-Axis Josephson Junctions
• Macroscopic quantum tunneling in globally coupled series arrays of Josephson junctions
• Macroscopic quantum tunneling and quasiparticle-tunneling blockade effect in s-wave/d-wave hybrid junctions
• Theory of Macroscopic Quantum Tunneling and Dissipation in High-Tc Josephson Junctions
• Possible observation of energy level quantization in an intrinsic Josephson junction

Cited by in corpus (4)

• Spectrum of Andreev bound states in Josepshon junctions with a ferromagnetic insulator
• Theory of quantum transport in Josephson junctions with a ferromagnetic insulator
• Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction
• Tunneling Hamiltonian description of the atomic-scale 0-pi transition in superconductor/ferromagnetic-insulator junctions