Theory of the neutral nitrogen-vacancy center in diamond and its application to the realization of a qubit

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Abstract

The negatively charged nitrogen-vacancy defect (NV-) in diamond has attracted much attention in recent years in qubit and biological applications. The negative charge is donated from nearby nitrogen donors that could limit or stem the successful application of NV-. In this study, we identify the neutral nitrogen-vacancy defect (NV0) by ab initio supercell calculations through the comparison of the measured and calculated hyperfine tensors of the A4 2 excited state. Our analysis shows that (i) the spin state can be selectively occupied optically, (ii) the electron spin state can be manipulated by time-varying magnetic field, and (iii) the spin state may be read out optically. Based on this NV0 is a hope for realizing qubit in diamond without the need of nitrogen donors. In addition, we propose that NV0 may be more sensitive magnetometer than the ultrasensitive NV-.

Original languageEnglish
Article number235210
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number23
DOIs
Publication statusPublished - Jun 30 2009

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Diamond
Vacancies
Diamonds
Nitrogen
diamonds
nitrogen
Defects
defects
Magnetometers
stems
Excited states
electron spin
magnetometers
Tensors
tensors
Magnetic fields
Electrons
magnetic fields
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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abstract = "The negatively charged nitrogen-vacancy defect (NV-) in diamond has attracted much attention in recent years in qubit and biological applications. The negative charge is donated from nearby nitrogen donors that could limit or stem the successful application of NV-. In this study, we identify the neutral nitrogen-vacancy defect (NV0) by ab initio supercell calculations through the comparison of the measured and calculated hyperfine tensors of the A4 2 excited state. Our analysis shows that (i) the spin state can be selectively occupied optically, (ii) the electron spin state can be manipulated by time-varying magnetic field, and (iii) the spin state may be read out optically. Based on this NV0 is a hope for realizing qubit in diamond without the need of nitrogen donors. In addition, we propose that NV0 may be more sensitive magnetometer than the ultrasensitive NV-.",
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