8 October 2014 Quantum repeater architecture and NV-based node technology
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We present a quantum repeater architecture using nitrogen-vacancy (NV) diamond based quantum information devices. The NV-diamond based device consists of a single negatively charged NV (NV-) center and an optical cavity. The electron of the NV center is an interface to light to be used to distribute long-distance entanglement as well as entanglement bonds for cluster state operation at each nodes. The nuclear spin-1=2 of nitrogen 15 can be used as memory. Based on this device, A scheme with as small as 10 devices to a scalable architecture is constructed, showing the necessary node technology as well as the performance such quantum communication systems.
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Kae Nemoto, Michael Trupke, Simon J. Devitt, Ashley M. Stephens, Burkhard Scharfenberger, Kathrin Buczak, Tobias Nöbauer, Jörg Schmiedmayer, William J. Munro, "Quantum repeater architecture and NV-based node technology", Proc. SPIE 9225, Quantum Communications and Quantum Imaging XII, 922507 (8 October 2014); doi: 10.1117/12.2061182; https://doi.org/10.1117/12.2061182

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