Quantum repeaters based on Rydberg-blockade-coupled atomic ensembles

Yang Han, Bing He, Khabat Heshami, Cheng-Zu Li, and Christoph Simon
Phys. Rev. A 81, 052311 – Published 11 May 2010

Abstract

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 multiexcitation 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.

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  • Received 11 March 2010

DOI:https://doi.org/10.1103/PhysRevA.81.052311

©2010 American Physical Society

Authors & Affiliations

Yang Han1,2, Bing He1, Khabat Heshami1, Cheng-Zu Li2, and Christoph Simon1

  • 1Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary T2N 1N4, Alberta, Canada
  • 2College of Science, National University of Defense Technology, Changsha 410073, People’s Republic of China

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Issue

Vol. 81, Iss. 5 — May 2010

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