Entanglement mediated by DC current induced nonreciprocal graphene plasmonics

TL;DR

This paper demonstrates that nonreciprocal graphene plasmon polaritons, induced by DC current, can effectively generate and control entanglement between two quantum emitters, advancing quantum device development.

Contribution

It introduces the use of DC current induced nonreciprocal graphene plasmons for entanglement mediation, showing enhanced control over quantum correlations.

Findings

Nonreciprocal graphene plasmons enhance entanglement compared to vacuum.

Good control and enhancement of entanglement over vacuum.

Potential for tunable quantum device applications.

Abstract

We investigate entanglement mediated by DC current induced nonreciprocal graphene plasmon polaritons. Nonreciprocal systems are ideal for the enhancement, control, and preservation of entanglement due to the potential for unidirectional beam-like wave propagation, i.e., efficiently transporting photons from one emitter to another. Using a quantum master equation and three-dimensional Green's function analysis, we investigate a system consisting of two two-level emitters dominantly interacting via electric current induced nonreciprocal plasmonic modes of a graphene waveguide. We use concurrence as a measure of entanglement. We show that nonreciprocal graphene plasmon polaritons are a promising candidate to generate and mediate concurrence, where it is shown that there is good enhancement and control of entanglement over vacuum, which is beneficial for the broad applications of entanglement as a quantum resource. We believe our findings contribute to the development of quantum devices, enabling efficient and tunable entanglement between two-level systems, which is a central goal in quantum technologies.