Chiral states and nonreciprocal phases in a Josephson junction ring

TL;DR

This paper proposes methods to load, manipulate, and detect chiral states in a Josephson junction ring, exploring their symmetry properties and potential use in nonreciprocal quantum devices through realistic simulations.

Contribution

It introduces a protocol for controlling chiral states in Josephson junction rings and demonstrates their potential in quantum nonreciprocal applications.

Findings

Successful simulation of chiral state manipulation

Identification of symmetry properties under time reversal and parity

Potential application in nonreciprocal quantum devices

Abstract

In this work, we propose how to load and manipulate chiral states in a Josephson junction ring in the so called transmon regimen. We characterise these states by their symmetry properties under time reversal and parity transformations. We describe an explicit protocol to load and detect the states within a realistic set of circuit parameters and show simulations that reveal the chiral nature. Finally, we explore the utility of these states in quantum technological nonreciprocal devices.