Coherent frequency-down-conversion interface for quantum repeaters

Details Coherent frequency-down-conversion interface for quantum repeaters Coherent frequency-down-conversion interface for quantum repeaters

2010-06-23

arxiv.org/abs/1006.4585v2

Optics Express 18(21) 22099-22104 (2010)

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

We report a coherence-preserving photon frequency down-conversion experiment based on difference-frequency generation in a periodically poled Lithium niobate waveguide, at the single-photon level. The coherence of the process has been demonstrated by measuring the phase coherence of pseudo single-photon time-bin qubits after frequency conversion with an interference visibility of > 96 %. This interface could be of interest for quantum repeater based hybrid networks.

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