Entangled absorption of a single photon with a single spin in diamond

Hideo Kosaka, Naeko Niikura

Research output: Contribution to journalArticle

27 Citations (Scopus)

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.

Original languageEnglish
Article number053603
JournalPhysical review letters
Volume114
Issue number5
DOIs
Publication statusPublished - 2015 Feb 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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