Generation of energy-entangled W states via parametric fluorescence in integrated devices

TL;DR

This paper proposes a method to generate tripartite energy-entangled W states using integrated micro-ring resonators and spontaneous four-wave mixing, offering a compact alternative to bulk optics approaches.

Contribution

It introduces a novel integrated optical scheme for creating energy-entangled W states and compares it with traditional polarization-entangled methods.

Findings

Feasible procedure for generating energy-entangled W states.

Comparison shows advantages of integrated energy-entanglement scheme.

Potential for scalable quantum information processing.

Abstract

Tripartite entangled states, such as GHZ and W states, are typically generated by manipulating two pairs of polarization-entangled photons in bulk optics. Here we propose a scheme to generate W states that are entangled in the energy degree of freedom in an integrated optical circuit. Our approach employs photon pairs generated by spontaneous four-wave mixing (SFWM) in a micro- ring resonator. We also present a feasible procedure for demonstrating the generation of such a state, and we compare polarization-entangled and energy-entangled schemes for the preparation of W states.