Einstein-Podolsky-Rosen steering in non-Hermitian, nonlinear soliton surface plasmons

TL;DR

This paper explores quantum EPR steering in a non-Hermitian, nonlinear soliton-surface plasmon system, demonstrating tunable quantum correlations and potential for secure quantum communication.

Contribution

It introduces a non-Hermitian quantum dynamics framework to analyze EPR steering in soliplasmonic systems with controllable coupling strengths.

Findings

Quantum steering can be tuned via coupling strength.

EPR steering persists for initially Fock states.

Potential application in one-sided quantum key distribution.

Abstract

We investigate the dynamics of Einstein-Podolsky-Rosen steering in a soliplasmonic system where the asymmetrical coupling between linear solitons and nonlinear plasmons is controlled by the weak soliton amplitude. We employ non-Hermitian quantum dynamics to evaluate quantum steering witnesses for different coupling strengths. Quantum steering is examined for an initially Fock state and we briefly discuss Einstein-Podolsky-Rosen entanglement for initially coherent states. We numerically investigate the adjustability of the witnessing periods of quantum steering via tunable coupling strength of soliton-plasmon interaction and discuss the possibility of the nonlinear soliplasmonic systems as a robust platform for implementing one-sided quantum key distributions.