Quantum repeaters based on Rydberg-blockade coupled atomic ensembles

Details Quantum repeaters based on Rydberg-blockade coupled atomic ensembles Quantum repeaters based on Rydberg-blockade coupled atomic ensembles

2010-03-11

arxiv.org/abs/1003.2353v1

Phys. Rev. A 81, 052311 (2010)

Physics

Quantum Physics

8 pages, 5 figures, 1 table

Scientific paper

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.

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