We propose a scheme for realizing quantum repeaters with Rydberg-blockade coupled atomic ensembles, based on a recently proposed collective encoding strategy. Rydberg-blockade mediated two-qubit gates and efficient cooperative photon emission are employed to create ensemble-photon entanglement. Thanks to deterministic entanglement swapping operations via Rydberg-based two-qubit gates, and to the suppression of multi-excitation errors by the blockade effect, the entanglement distribution rate of the present scheme is higher by orders of magnitude than the rates achieved by other ensemble-based repeaters. We also show how to realize temporal multiplexing with this system, which offers an additional speedup in entanglement distribution.
@article{arxiv.1003.2353,
title = {Quantum repeaters based on Rydberg-blockade coupled atomic ensembles},
author = {Yang Han and Bing He and Khabat Heshami and Cheng-Zu Li and Christoph Simon},
journal= {arXiv preprint arXiv:1003.2353},
year = {2015}
}