A New Protocol of Continuous-Variable Entanglement Distillation

TL;DR

This paper presents a novel continuous-variable entanglement distillation protocol that uses atom-photon entanglement, reducing resource requirements and improving efficiency compared to existing methods.

Contribution

The proposed protocol introduces atom-photon entanglement to replace atom-atom entanglement, saving quantum memories and enhancing operational efficiency.

Findings

Requires only three quantum memories and photon detectors

Uses linear temporal resources and constant physical resources

Achieves efficient entanglement distillation with fixed iteration model

Abstract

We introduce a new protocol in continuous variable entanglement distillation that requires only linear temporal and constant physical or spatial resources.Compared with the existing protocols, our protocol uses atom-photon entanglement to substitute for atom-atom entanglement in existing protol, which will not only save the number of quantum memories, but also has the advantages in operation efficiency and temporal saving. The distillation can be realized by a fixed model of iterations, in which only three quantum memories and photon detectors are required.