Asynchronous entanglement from coherently coupled nonlinear cavities

TL;DR

This paper demonstrates that coherently coupled nonlinear optical cavities can produce strong, asynchronous entanglement in their output fields, offering potential for quantum information applications like all-optical quantum memories.

Contribution

It introduces a method to generate asynchronous entanglement using coherently coupled nonlinear cavities, with a practical implementation proposal for whispering gallery mode resonators.

Findings

Strong optical entanglement observed in coupled cavities.

Asynchronous quantum correlations enable quantum memory applications.

Feasible experimental setup for microtoroid resonators proposed.

Abstract

The output fields of a pair of coherently coupled nonlinear optical cavities are found to exhibit strong optical entanglement. For sufficiently strong coupling the quantum correlations become asynchronous providing a resource for quantum information protocols such as all-optical quantum memories. A straightforward experimental implementation applicable to whispering gallery mode resonators such as microtoroids is proposed.