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Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion

B. J. Shields, Q. P. Unterreithmeier, N. P. de Leon, H. Park, and M. D. Lukin
Phys. Rev. Lett. 114, 136402 – Published 31 March 2015
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Abstract

Efficient readout of individual electronic spins associated with atomlike impurities in the solid state is essential for applications in quantum information processing and quantum metrology. We demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond. The method is based on conversion of the electronic spin state of the NV to a charge-state distribution, followed by single-shot readout of the charge state. Conversion is achieved through a spin-dependent photoionization process in diamond at room temperature. Using NVs in nanofabricated diamond beams, we demonstrate that the resulting spin readout noise is within a factor of 3 of the spin projection noise level. Applications of this technique for nanoscale magnetic sensing are discussed.

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  • Received 1 October 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.136402

© 2015 American Physical Society

Authors & Affiliations

B. J. Shields, Q. P. Unterreithmeier, N. P. de Leon, H. Park, and M. D. Lukin*

  • Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

  • *lukin@physics.harvard.edu

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Vol. 114, Iss. 13 — 3 April 2015

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