Nanolaser in the selfgenerated nonequilibrium environment: quantum fluctuations and entanglement

TL;DR

This paper explores the quantum dynamics of a nanolaser in a nonequilibrium environment, revealing enhanced entanglement and quantum effects due to nonthermal photon interactions.

Contribution

It introduces a nonlinear, selfconsistent master equation for nanolaser dynamics in a nonequilibrium setting, highlighting increased entanglement and quantum behavior.

Findings

Entanglement between nanoparticle and quantum dot increases significantly.

Lasing intensity is enhanced in the nonequilibrium environment.

The nanolaser exhibits more quantum characteristics due to nonthermal photon interactions.

Abstract

We investigate the dynamics of the spaser-based nanolaser in the strong incoherent pumping regime in the quantum limit when the photon number is the order of unity. We consider the situation where the newly irradiated photon finds itself in the cloud of earlier irradiated photons that are not thermalized. As the result the entanglement of nanoparticle with quantum dot degrees of freedom in the nanolaser and the lasing intensity increases several times. In fact the nonthermal bath effectively makes the nanolaser "more quantum" and master equation for the nanolaser density matrix nonlinear and selfconsistent.