2015年10月
Absorption-based quantum communication with NV centres
NEW JOURNAL OF PHYSICS
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- 巻
- 17
- 号
- 開始ページ
- 103012
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/1367-2630/17/10/103012
- 出版者・発行元
- IOP PUBLISHING LTD
We propose a scheme for performing an entanglement-swapping operation within a quantum communications hub (a Bell like measurement) using an NV-centre's vertical bar +/- 1 > <-> vertical bar A(2)> optical 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.
- リンク情報
- ID情報
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- DOI : 10.1088/1367-2630/17/10/103012
- ISSN : 1367-2630
- Web of Science ID : WOS:000367329000001