Quantum interference and manipulation of entanglement in silicon wire waveguide quantum circuits

TL;DR

This paper demonstrates integrated silicon photonic circuits capable of quantum interference and entanglement manipulation, advancing scalable quantum photonic technology using compact, silicon-based components.

Contribution

It introduces a silicon-on-insulator platform for quantum photonics, enabling quantum interference and entanglement control in significantly smaller devices than before.

Findings

Successful two-photon quantum interference in a multi-mode coupler

Manipulation of entanglement in a silicon Mach-Zehnder interferometer

Potential for scalable, all-silicon quantum photonic systems

Abstract

Integrated quantum photonic waveguide circuits are a promising approach to realizing future photonic quantum technologies. Here, we present an integrated photonic quantum technology platform utilising the silicon-on-insulator material system, where quantum interference and the manipulation of quantum states of light are demonstrated in components orders of magnitude smaller than in previous implementations. Two-photon quantum interference is presented in a multi-mode interference coupler, and manipulation of entanglement is demonstrated in a Mach-Zehnder interferometer, opening the way to an all-silicon photonic quantum technology platform.