Macroscopically entangled light fields: A quantum laser

TL;DR

This paper introduces a new quantum laser method that generates macroscopically entangled light fields through deterministic phase control in an interferometer, demonstrating nonclassical wave-based correlations.

Contribution

It presents a novel wave-based approach for generating macroscopically entangled light, differing from traditional particle-based quantum correlations.

Findings

Demonstrates entanglement between output light fields using Hong-Ou-Mandel-type anticorrelation.

Shows deterministic control of phase-sensitive anticorrelation via frequency shifts.

Provides evidence of nonclassical, macroscopic quantum features in the generated light fields.

Abstract

A novel method of macroscopically entangled light-pair generation is presented for a quantum laser using randomness-based deterministic phase control of coherent light in a Mach-Zehnder interferometer (MZI). Unlike the particle nature-based quantum correlation in conventional quantum mechanics, the wave nature of photons is applied for collective phase control of coherent fields, resulting in a deterministically controllable nonclassical phenomenon. For the proof of principle, the entanglement between output light fields from an MZI is examined using the Hong-Ou-Mandel-type anticorrelation technique, where the anticorrelation is a direct evidence of the nonclassical features in an interferometric scheme. For the generation of random phase bases between two bipartite input coherent fields, a deterministic control of opposite frequency shifts results in phase sensitive anticorrelation, which is a macroscopic quantum feature.