Physics – Quantum Physics
Scientific paper
2010-10-14
Phys. Rev. B 83, 060503(R) (2011)
Physics
Quantum Physics
4 pages, 4 figures
Scientific paper
10.1103/PhysRevB.83.060503
We theoretically study the macroscopic quantum tunneling (MQT) in a hetero Josephson junction formed by a conventional single-gap superconductor and a multi-gap one such as ${MgB}_{2}$ and iron-based superconductors. In such a Josephson junction more than one phase differences are defined. We clarify the quantum dynamics of the phase differences and construct a theory for the MQT in the multi-gap Josephson junctions. The dynamics of the phase differences are strongly affected by the Josephson-Leggett mode, which is the out-of-phase oscillation mode of the phase differences. The escape rate is calculated in terms of the effective action renormalized by the Josephson-Leggett mode. It is shown that the escape rate is drastically enhanced when the frequency of the Josephson-Leggett mode is less than the Josephson-plasma frequency.
Koyama Tomio
Machida Masahiko
Ota Yukihiro
No associations
LandOfFree
Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-284634