Deterministic generation of bright multicolor entanglement from optomechanical systems

TL;DR

This paper proposes a deterministic scheme using optomechanical systems to generate bright, multicolor continuous-variable entangled states, overcoming probabilistic limitations of traditional methods and enabling integrated quantum networks.

Contribution

It introduces a novel, deterministic method for creating multicolor CV entanglement using optomechanical resonators and optical frequency combs, extending entanglement capabilities beyond existing frequency conversion techniques.

Findings

Deterministic generation of multicolor CV entanglement demonstrated theoretically.

Scheme overcomes probabilistic limitations of photon pair generation.

Potential for integration into chip-scale quantum devices.

Abstract

Entangled continuous variable (CV) Gaussian states with different wavelengths plays a central role in recent CV-based approaches to quantum network, quantum information processing and quantum metrology. Typically, experiments demonstrating CV entanglement exploit the optical parametric frequency down conversion. Due to the probabilistic nature of photon pair generation, the entanglement involving the post-selection of photonic qubits is limited to at most three colors. Here We theoretically present a scheme for the deterministic generation of entanglement among bright multicolor CV Gaussian states from an optomechanical system using existing experimental technologies. In our scheme an optical frequency comb is input into an optomechanical resonator and then the amplified optomechanical coupling makes multipartite entanglement among them. Our scheme overcomes the limitation of usable frequency of entangled CVs in frequency conversion process. It can be extended to generate multipartite entanglement between orthogonal modes with a single frequency or between microwave and optical CVs, or even among a microwave frequency comb. This optomechanical device can be integrated on a chip.