Generating single- and many-body quantum magnonic states

TL;DR

This paper presents a theoretical framework for generating and analyzing non-classical quantum magnonic states using solid-state spin defect ensembles coupled to a magnetic bath, highlighting their potential for quantum many-body state creation.

Contribution

It introduces a novel theoretical approach to characterize quantum correlations in magnonic states emitted by spin defect ensembles, advancing quantum magnonics research.

Findings

Magnons emitted retain quantum correlations from the solid-state emitters.

The framework enables deterministic generation of quantum many-body magnonic states.

Correlations depend on experimentally tunable parameters.

Abstract

The growing interest in quantum magnonics is driving the development of advanced techniques for generating, controlling, and detecting non-classical magnonic states. Here, we explore the potential of an ensemble of solid-state spin defects coupled to a shared magnetic bath as a source of such states. We establish a theoretical framework to characterize the quantum correlations among magnons emitted by the ensemble into the bath and investigate how these correlations depend on experimentally tunable parameters. Our findings show that the emitted magnons retain the quantum correlations inherent to the solid-state emitters, paving the way for the deterministic generation of quantum many-body magnonic states.