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Depolarization Dynamics in a Strongly Interacting Solid-State Spin Ensemble.

Joonhee Choi1,2, Soonwon Choi1, Georg Kucsko1

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.

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|March 18, 2017
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Summary
This summary is machine-generated.

We observed fast, nonexponential spin relaxation in dense nitrogen-vacancy centers in diamond. A new model explains this by considering interactions, disorder, and dissipation, enabling future many-body spin experiments.

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Materials science

Background:

  • Nitrogen-vacancy (NV) centers in diamond are promising solid-state qubits.
  • Understanding spin dynamics in dense NV ensembles is crucial for quantum technologies.
  • Previous studies have not fully explained the observed spin relaxation behaviors.

Purpose of the Study:

  • To investigate the depolarization dynamics of dense ensembles of dipolar interacting spins.
  • To develop a microscopic model explaining anomalous spin relaxation.
  • To provide a theoretical framework for controlled many-body experiments.

Main Methods:

  • Studying depolarization dynamics in dense ensembles of nitrogen-vacancy centers.
  • Developing a microscopic model incorporating long-range interactions, disorder, and dissipation.
  • Comparing model predictions with experimental results.

Main Results:

  • Observed anomalously fast, density-dependent, and nonexponential spin relaxation.
  • The proposed microscopic model quantitatively agrees with experimental data.
  • The model successfully explains the interplay of interactions, disorder, and dissipation.

Conclusions:

  • The developed model accurately describes spin relaxation in dense NV ensembles.
  • This work facilitates controlled many-body experiments with solid-state spins.
  • The findings advance the understanding of quantum dynamics in interacting spin systems.