Aharonov-Casher Effect for Plasmons in a Ring of Josephson Junctions

TL;DR

This paper demonstrates the Aharonov-Casher effect for plasmons in a ring of Josephson junctions, showing how phase slip interference makes plasmon excitations sensitive to island charges, unlike in the absence of phase slips.

Contribution

It introduces the Aharonov-Casher effect for plasmons in Josephson junction rings, revealing charge sensitivity due to phase slip interference.

Findings

Hybridization of persistent current states and plasmon branches due to phase slips.

Interference effects make plasmons sensitive to island charges.

Aharonov-Casher effect observed for plasmons in the system.

Abstract

Phase slips in a one-dimensional closed array of Josephson junctions hybridize the persistent current states (PCS) and plasmon branches of excitations. The interference between phase slips passing through different junctions of the array makes the hybridization sensitive to the charges of the superconducting islands comprising the array. This in turn results in the Aharonov-Casher effect for plasmons, which in absence of phase slips are insensitive to island charges.