Two-mode single-atom laser as a source of entangled light

TL;DR

This paper proposes a two-mode single-atom laser system capable of generating macroscopic entangled light, accounting for atomic relaxation and cavity losses, and demonstrating entanglement over various parameters.

Contribution

It introduces a novel two-mode single-atom laser setup that produces entangled light, considering realistic atomic and cavity dissipation effects.

Findings

System generates macroscopic entangled light.

Entanglement persists over a wide range of parameters.

Effective despite atomic relaxation and cavity losses.

Abstract

A two-mode single-atom laser is considered, with the aim of generating entanglement in macroscopic light. Two transitions in the four-level gain medium atom independently interact with the two cavity modes, while two other transitions are driven by control laser fields. Atomic relaxation as well as cavity losses are taken into account. We show that this system is a source of macroscopic entangled light over a wide range of control parameters and initial states of the cavity field.