Quantum repeaters based on Rydberg-blockade-coupled atomic ensembles

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.052311· OSTI ID:21408788

Yang, Han ^[1]; Bing, He; Heshami, Khabat; Simon, Christoph ^[1]; Chengzu, Li ^[2]

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1. Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary T2N 1N4, Alberta (Canada)
2. College of Science, National University of Defense Technology, Changsha 410073 (China)

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.

• OSTI ID: 21408788
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
ELEMENTARY PARTICLES
EMISSION
ERRORS
INFORMATION
MASSLESS PARTICLES
PHOTON EMISSION
PHOTONS
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION