Efficient quantum repeater based on deterministic Rydberg gates

TL;DR

This paper introduces a quantum repeater design using Rydberg blockade in atomic ensembles, significantly enhancing entanglement distribution speed for long-distance quantum communication.

Contribution

It presents a novel quantum repeater architecture employing deterministic Rydberg gates, improving efficiency and robustness over traditional methods.

Findings

Entanglement distribution rate improved by up to 100 times.

The scheme is robust and suitable for practical long-distance quantum communication.

Uses mesoscopic atomic ensembles with Rydberg blockade for all key operations.

Abstract

We propose an efficient quantum repeater architecture with mesoscopic atomic ensembles, where the Rydberg blockade is employed for deterministic local entanglement generation, entanglement swapping and entanglement purification. Compared with conventional atomic-ensemble-based quantum repeater, the entanglement distribution rate is improved by up to two orders of magnitude with the help of the deterministic Rydberg gate. This new quantum repeater scheme is robust and fast, and thus opens up a new way for practical long-distance quantum communication.