Theory of Macroscopic Quantum Dynamics in High-Tc Josephson Junctions

Details Theory of Macroscopic Quantum Dynamics in High-Tc Josephson Junctions Theory of Macroscopic Quantum Dynamics in High-Tc Josephson Junctions

2009-12-23

arxiv.org/abs/0912.4565v1

Proceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology (World Scien

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure, conference proceedings of ISQM-Tokyo '08

Scientific paper

We have theoretically investigated macroscopic quantum tunneling (MQT) and the influence of nodal quasiparticles and zero energy bound states (ZES) on MQT in s-wave/d-wave hybrid Josephson junctions. In contrast to d-wave/d-wave junctions, the low-energy quasiparticle dissipation resulting from nodal quasiparticles and ZES is suppressed due to a quasiparticle-tunneling blockade effect in an isotropic s-wave superconductor. Therefore, the inherent dissipation in these junctions is found to be weak. This result suggests high potential of s-wave/d-wave hybrid junctions for applications in quantum information devices.

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