Quantum logic readout and cooling of a single dark electron spin

Fazhan Shi, Qi Zhang, Boris Naydenov, Fedor Jelezko, Jiangfeng Du, Friedemann Reinhard, and Jörg Wrachtrup
Phys. Rev. B 87, 195414 – Published 9 May 2013

Abstract

We study a single dark N2 electron spin defect in diamond, which is magnetically coupled to a nearby nitrogen-vacancy (NV) center. We perform pulsed electron spin resonance on this single spin by mapping its state to the NV center spin and optically reading out the latter. Moreover, we show that the NV center's spin polarization can be transferred to the electron spin by combined two decoupling control-NOT gates. These two results allow us to extend the NV center's two key properties—optical spin polarization and detection—to any electron spin in its vicinity. This enables dark electron spins to be used as local quantum registers and engineerable memories.

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  • Received 9 February 2013

DOI:https://doi.org/10.1103/PhysRevB.87.195414

©2013 American Physical Society

Authors & Affiliations

Fazhan Shi1,2, Qi Zhang2, Boris Naydenov3, Fedor Jelezko3, Jiangfeng Du2, Friedemann Reinhard1, and Jörg Wrachtrup1

  • 13rd Physics Institute and Research Center SCoPE, University of Stuttgart, Germany
  • 2Hefei National Laboratory for Physics Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 3Institute for Quantum Optics, University of Ulm, Germany

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Issue

Vol. 87, Iss. 19 — 15 May 2013

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