Quantum coherent control of highly multipartite continuous-variable entangled states by tailoring parametric interactions

TL;DR

This paper demonstrates theoretically how to generate diverse multipartite continuous-variable entangled states using multimode optical parametric oscillators by tailoring the pump shape or medium geometry, with practical feasibility.

Contribution

It introduces a method to produce various multipartite entangled states through controlled parametric interactions in optical oscillators, leveraging current technology.

Findings

Multimode optical parametric oscillators can generate diverse entangled states.

Tailoring pump shape or medium geometry controls the entanglement properties.

The proposed methods are feasible with existing optical technology.

Abstract

The generation of continuous-variable multipartite entangled states is important for several protocols of quantum information processing and communication, such as one-way quantum computation or controlled dense coding. In this article we theoretically show that multimode optical parametric oscillators can produce a great variety of such states by an appropriate control of the parametric interaction, what we accomplish by tailoring either the spatio-temporal shape of the pump, or the geometry of the nonlinear medium. Specific examples involving currently available optical parametric oscillators are given, hence showing that our ideas are within reach of present technology.