Large Distance Continuous Variables Communication with Concatenated Swaps

TL;DR

This paper investigates how optomechanical systems can generate entanglement between light fields for quantum teleportation over large distances, considering realistic conditions and system imperfections.

Contribution

It introduces a detailed analysis of entanglement generation and teleportation using concatenated swaps in optomechanical setups under practical constraints.

Findings

Entanglement remains robust under certain realistic conditions.

Teleportation fidelity is affected by mechanical quality factors and losses.

The protocol's effectiveness is demonstrated with non-ideal system parameters.

Abstract

The radiation-pressure interaction between electromagnetic fields and mechanical resonators can be used to efficiently entangle two light fields which couple to a single mechanical mode. We analyze the performance of this process under realistic optomechanical conditions, and we determine the effectiveness of the resulting entanglement as a resource for quantum teleportation of continuous-variable light signals, over large distances, mediated by concatenated swap operations. We study the sensitiveness of the protocol to the quality factor of the mechanical systems, and its performance in non-ideal situations in which losses and reduced detection efficiencies are taken into account.