Creation of non-classical states of light in a chiral waveguide

TL;DR

This paper demonstrates how chiral emitters driven coherently can generate non-classical light states, characterized by Wigner functions, with potential applications in quantum metrology, advancing quantum optics research.

Contribution

It introduces a method to produce non-classical photon states using chiral emitters and coherent driving, with a detailed mode analysis and practical implications.

Findings

Generation of non-classical states with mixtures of few-photon-added coherent states

Mode-specific analysis using Wigner functions confirms non-classicality

Potential for experimental realization and quantum metrology applications

Abstract

Creating non-classical states of light from simple quantum systems together with classical resources is a challenging problem. We show how chiral emitters under a coherent drive can generate non-classical photon states. For our analysis, we select a specific temporal mode in the transmitted light field, resulting in a coupled master equation for the relevant mode and the chiral emitters. We characterise the mode's state by its Wigner function and show that the emission from the system predominantly produces mixtures of few-photon-added coherent states. We argue that these non-classical states are experimentally accessible and show their application for quantum metrology.