Motional entanglement of remote optically levitated nanoparticles

TL;DR

This paper proposes a method to entangle the motion of distant optically levitated nanoparticles using inelastic light scattering and interference, enabling remote quantum correlations with reduced heating effects.

Contribution

It introduces a novel scheme for motional entanglement of remote nanoparticles via light coupling and interference, with analysis under realistic experimental conditions.

Findings

Transient entanglement achievable between particles

Conditional entanglement demonstrated

Recoil heating effects mitigated

Abstract

We show how to entangle the motion of optically levitated nanoparticles in distant optical tweezers. The scheme consists in coupling the inelastically scattered light of each particle into transmission lines and directing it towards the other particle. The interference between this light and the background field introduces an effective coupling between the two particles while simultaneously reducing the effect of recoil heating. We analyze the system dynamics, showing that both transient and conditional entanglement between remote particles can be achieved under realistic experimental conditions.