Correlations in emitters coupled to plasmonic waveguides

TL;DR

This paper investigates the quantum and classical correlations among distant emitters coupled through plasmonic waveguides, highlighting the importance of discord over entanglement in their dynamics.

Contribution

It reveals that quantum discord, not entanglement, is the key resource in emitter interactions mediated by plasmonic waveguides, offering new insights into quantum correlations.

Findings

Discord is the dominant quantum correlation in the system.

Entanglement does not significantly influence emitter dynamics.

Coupling with plasmon modes affects collective decay rates.

Abstract

We report on quantum, classical, and total correlations in a set of distant quantum emitters coupled via their interaction with the plasmon modes of a one-dimensional waveguide driven by an external laser field. The coupling of the emitters with the plasmonic modes and its influence on the collective decay rate suggest that entanglement does not play a significant role in the qubit dynamics. Rather, discord is the quantity that matters and should be harnessed as a resource.