Parity violation effects in the Josephson junction of a $p$-wave superconductor

TL;DR

This paper theoretically explores parity violation effects in a $p$-wave ferromagnetic superconductor, proposing experimental schemes and predicting a three-orders-of-magnitude increase in observable effects compared to previous studies.

Contribution

It introduces the first theoretical analysis of parity violation in $p$-wave superconductors and suggests experimental setups to enhance and detect these effects.

Findings

Parity violation magnitude increased by three orders of magnitude.

Proposed experimental scheme using UGe$_2$ superconductor.

Setup for further enhancement of parity violation signals.

Abstract

The phenomenon of the parity violation due to weak interaction may be studied with superconducting systems. Previous research considered the case of conventional superconductors. We here theoretically investigate the parity violation effect in an unconventional $p$-wave ferromagnetic superconductor, and find that its magnitude can be increased by three orders of magnitude, as compared to results of earlier studies. For potential experimental observations, the superconductor UGe$_2$ is suggested, together with the description of a possible experimental scheme allowing one to effectively measure and control the phenomenon. Furthermore, we put forward a setup for a further significant enhancement of the signature of parity violation in the system considered.