Integrated photonics for continuous-variable quantum optics

TL;DR

This paper reviews the integration of sources and detectors for continuous-variable quantum states into chip-scale photonic circuits, aiming to advance practical quantum technologies in communication, sensing, and computing.

Contribution

It provides a comprehensive overview of recent progress in integrating continuous-variable quantum photonic components on chip-scale platforms.

Findings

Advances in chip-scale integration of quantum light sources

Development of high-efficiency detectors for continuous-variable states

Potential for scalable, room-temperature quantum photonic devices

Abstract

Quantum technologies promise profound advances in communication security, sensing and computing. The underpinning hardware must be engineered to generate, manipulate and detect quantum phenomena with exceptional performance, whilst being mass-manufacturable for real-world applications. A leading approach is chip-scale quantum photonics. The continuous-variable regime for quantum optics has been exploited in a number of technologies, including the detection of gravitational waves, by operating below the standard quantum limit of the light's shot noise. The availability of room-temperature, deterministic sources and high efficiency detectors suitable for continuous-variable state generation and measurement is a compelling motivation for this particular paradigm. This review focusses on efforts to integrate sources and detectors of continuous-variable light states into chip-scale photonic integrated circuits.