Establishing EPR-channels between Nanomechanics and Atomic Ensembles

TL;DR

This paper proposes a method to connect nanomechanical systems with atomic ensembles using an optical quantum bus, enabling entanglement and quantum state transfer even from high-energy states.

Contribution

It introduces a novel interface between nanomechanics and atomic ensembles for quantum information processing via EPR entanglement.

Findings

Successful projection into EPR entangled states.

Entanglement observable from high-energy initial states.

Potential for quantum teleportation between systems.

Abstract

We suggest to interface nanomechanical systems via an optical quantum bus to atomic ensembles, for which means of high precision state preparation, manipulation and measurement are available. This allows in particular for a Quantum Non-Demolition Bell measurement, projecting the coupled system, atomic ensemble - nanomechanical resonator, into an entangled EPR-state. The entanglement is observable even for nanoresonators initially well above their ground states and can be utilized for teleportation of states from an atomic ensemble to the mechanical system.