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Entangled Absorption of a Single Photon with a Single Spin in Diamond

Hideo Kosaka and Naeko Niikura
Phys. Rev. Lett. 114, 053603 – Published 5 February 2015
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Abstract

Quantum entanglement, a key resource for quantum information science, is inherent in a solid. It has been recently shown that entanglement between a single optical photon and a single spin qubit in a solid is generated via spontaneous emission. However, entanglement generation by measurement is rather essential for quantum operations. We here show that the physics behind the entangled emission can be time reversed to demonstrate entangled absorption mediated by an inherent spin-orbit entanglement in a single nitrogen vacancy center in diamond. Optical arbitrary spin state preparation and complete spin state tomography reveal the fidelity of the entangled absorption to be 95%. With the entangled emission and absorption of a photon, materials can be spontaneously entangled or swap their quantum state based on the quantum teleportation scheme.

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  • Received 2 October 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.053603

© 2015 American Physical Society

Synopsis

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Quantum Diamond Shines On

Published 5 February 2015

Diamond crystals enable new ways of storing single photons at room temperature and detecting their entanglement.

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Authors & Affiliations

Hideo Kosaka* and Naeko Niikura

  • Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan

  • *kosaka@ynu.ac.jp

See Also

Storage and Retrieval of THz-Bandwidth Single Photons Using a Room-Temperature Diamond Quantum Memory

Duncan G. England, Kent A. G. Fisher, Jean-Philippe W. MacLean, Philip J. Bustard, Rune Lausten, Kevin J. Resch, and Benjamin J. Sussman
Phys. Rev. Lett. 114, 053602 (2015)

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Vol. 114, Iss. 5 — 6 February 2015

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