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Long-Term Spin State Storage Using Ancilla Charge Memories.

Harishankar Jayakumar1, Artur Lozovoi1, Damon Daw1

  • 1Department of Physics, CUNY-City College of New York, New York, New York 10031, USA.

Physical Review Letters
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Researchers used confocal microscopy and electron spin resonance to achieve spin-to-charge conversion in nitrogen-vacancy (NV) centers in diamond. This enables new quantum sensing and spintronics measurement strategies.

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Area of Science:

  • Quantum Physics
  • Materials Science
  • Nanotechnology

Background:

  • Nitrogen-vacancy (NV) centers in diamond are promising quantum systems.
  • Efficient spin-to-charge conversion is crucial for quantum information processing and sensing.

Purpose of the Study:

  • To implement and demonstrate spin-to-charge conversion in NV centers.
  • To explore time-resolved manipulation and charge-aided detection of NV spin states.

Main Methods:

  • Utilized confocal microscopy and electron spin resonance (ESR).
  • Investigated spin-to-charge conversion in small ensembles of NV centers in bulk diamond.
  • Developed integrated measurement strategies.

Main Results:

  • Successfully demonstrated spin-to-charge conversion in NV centers.
  • Showed charge conversion of neighboring defects dependent on the NV spin state.
  • Achieved time-resolved NV spin manipulation and ancilla-charge-aided spin state detection.

Conclusions:

  • The developed techniques offer novel measurement strategies for fundamental science.
  • Results pave the way for advancements in quantum spintronics.
  • Opens avenues for enhanced color-center-based metrology, even at the single-defect level.