@article{oai:ynu.repo.nii.ac.jp:00009295,
 author = {Scharfenberger, Burkhard and Kosaka, Hideo and J, Munro William and Nemoto, Kae},
 journal = {New Journal of Physics},
 month = {Oct},
 note = {We propose a scheme for performing an entanglement-swapping operation within a quantum communications hub (a Bell like measurement) using an anNV-centre’s ∣1ñ « ∣A2ñoptical transition. This is based on the heralded absorption of a photon resonant with that transition. The quantum efficiency of a single photon absorption is low but can be improved by placing the NV centre inside a micro cavity to boost the interaction time and further by recycling the leaked photon back into the cavity after flipping its phase and/or polarization. Throughout this process, the NV is repeatedly monitored via a QND measurement that heralds whether or not the photon absorption has succeeded. Upon success we know a destructive Bell measurement has occurred between that photon and NV centre. Given low losses and high per-pass absorption probability, this scheme should allow the total success probability to approach unity. With long electron spin coherence times possible at low temperatures, this component could be useful within a memory-based quantum repeater or relay.},
 title = {Absorption-based Quantum Communication with NV centres},
 volume = {17},
 year = {2015}
}