Noise-Tolerant Optomechanical Entanglement via Synthetic Magnetism

TL;DR

This paper introduces a method to generate noise-tolerant optomechanical entanglement by breaking dark modes through synthetic magnetism, enabling robust quantum networks even at high temperatures.

Contribution

The study demonstrates how synthetic magnetism can break dark modes to produce entanglement resilient to thermal noise, a novel approach in optomechanical systems.

Findings

Entanglement is achievable via dark-mode breaking induced by synthetic magnetism.

Thermal phonon threshold for entanglement is significantly increased, up to three orders of magnitude.

The method enables noise-tolerant entanglement networks in optomechanical systems.

Abstract

Entanglement of light and multiple vibrations is a key resource for multi-channel quantum information processing and memory. However, entanglement generation is generally suppressed, or even fully destroyed, by the dark-mode (DM) effect induced by the coupling of multiple degenerate or near-degenerate vibrational modes to a common optical mode. Here we propose how to generate optomechanical entanglement via \emph{DM breaking} induced by synthetic magnetism. We find that at nonzero temperature, light and vibrations are \emph{separable} in the DM-unbreaking regime but \emph{entangled} in the DM-breaking regime. Remarkably, the threshold thermal phonon number for preserving entanglement in our simulations has been observed to be up to \emph{three} orders of magnitude stronger than that in the DM-unbreaking regime. The application of the DM-breaking mechanism to optomechanical networks can make noise-tolerant entanglement networks feasible. These results are quite general and can initiate advances in quantum resources with immunity against both dark modes and thermal noise.