Optical source of individual pairs of color-conjugated photons

TL;DR

This paper demonstrates how Kerr nonlinearity in optical circuits can generate high-quality, conjugated photon pairs at high rates, useful for quantum communication and entanglement applications.

Contribution

It introduces an optical circuit design leveraging Kerr nonlinearity for efficient, high-fidelity generation of conjugated photon pairs with potential for entanglement.

Findings

Photon pairs generated at up to 10^5 per second

g^{(2)}<10^{-2} indicating high photon purity

Scheme enables color-entangled photon generation

Abstract

We demonstrate that Kerr nonlinearity in optical circuits can lead to both resonant four-wave mixing and photon blockade, which can be used for high-yield generation of high-fidelity individual photon pairs with conjugated frequencies. We propose an optical circuit, which, in the optimal pulsed-drive regime, would produce photon pairs at the rate up to $10^5s^{-1}$ (0.5 pairs per pulse) with $g^{(2)}<10^{-2}$ for one of the conjugated frequencies. We show that such a scheme can be utilised to generate color-entangled photons.