Optimal quantum repeaters with doubly entangled state purification

Details Optimal quantum repeaters with doubly entangled state purification Optimal quantum repeaters with doubly entangled state purification

2009-02-23

arxiv.org/abs/0902.3862v1

Physics

Quantum Physics

5 pages and 3 figures

Scientific paper

Recently, Briegel et al. present a quantum repeaters protocol using nest entanglement purification for long distance quantum communication(Physical Review Letters \textbf{81},5932). In this paper we present a modified scheme for constructing an optimal quantum repeater using doubly entangled photon pairs that overcomes the limitations of quantum communication via noisy channels. Based on the imperfect quantum operations and classical communications, the polarization entangled quantum channels can be built with a better efficiency.

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