Quantum coherence of light emitted by two single-photon sources in a structured environment

TL;DR

This paper presents a theoretical framework for controlling quantum coherence of light from two single-photon sources in complex environments, enabling the design of superradiant and subradiant states with potential applications in nanophotonics and sensing.

Contribution

It introduces a novel theoretical approach to analyze and manipulate quantum coherence in structured environments, providing design rules for quantum state control.

Findings

Structured environments can induce long-range quantum coherence.

Generalized conditions for superradiant and subradiant states.

Control of quantum coherence using classical nanophotonic quantities.

Abstract

We develop a theoretical framework for the analysis of the quantum coherence of light emitted by two independent single-photon sources in an arbitrary environment. The theory provides design rules for the control of the degree of quantum coherence, in terms of classical quantities widely used in nanophotonics. As an important example, we derive generalized conditions to generate superradiant and subradiant states of the emitters, and demonstrate the ability of a structured environment to induce long-range quantum coherence. These results should have broad applications in quantum nanophotonics, and for the sensing of fluorescent sources in complex environments.