Entangled plasmon generation in nonlinear spaser system under action of external magnetic field

TL;DR

This paper theoretically explores quantum dynamics and entanglement of localized plasmons in multi-particle spaser systems, demonstrating conditions for stable regimes and proposing magnetic field control of plasmon correlations.

Contribution

It introduces a theoretical framework for stable plasmon regimes, investigates strong dipole interactions, and proposes magnetic field control for entangled plasmons in spaser systems.

Findings

Stable stationary regimes for plasmons are identified.

Strong dipole interactions decrease plasmon autocorrelation.

Magnetic field control of plasmon cross-correlation is proposed.

Abstract

The present paper theoretically investigates features of quantum dynamics for localized plasmons in three-particle or four-particle spaser systems consisting of metal nanoparticles and semiconductor quantum dots. In the framework of the mean field approximation, the conditions for the observation of stable stationary regimes for single-particle plasmons in spaser systems are revealed, and realization of these regimes is discussed. The strong dipole-dipole interaction between adjacent nanoparticles for the four-particle spaser system is investigated. We show that this interaction can lead to the decreasing of the autocorrelation function values for plasmons. The generation of entangled plasmons in a three-particle spaser system with nonlinear plasmon-exciton interaction is predicted. For the first time the use of an external magnetic field is proposed for control of the cross-correlation between plasmons in the three-particle spaser system.