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Dynamics of quantum correlation between separated nitrogen-vacancy centers embedded in plasmonic waveguide.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Nanophotonics

Background:

  • Nitrogen vacancy centers (NVCs) are promising solid-state qubits.
  • Maintaining quantum correlations (entanglement) is crucial for quantum technologies.
  • Plasmonic waveguides offer unique light-matter interaction capabilities.

Purpose of the Study:

  • To investigate the dynamics of quantum correlation between two separated NVCs.
  • To explore the role of a plasmonic waveguide as a common coupling medium.
  • To determine if quantum correlation can be preserved in a steady state.

Main Methods:

  • Simulating the quantum dynamics of two NVCs coupled via a 1D plasmonic waveguide.
  • Applying local driving fields to individual NVCs.
  • Analyzing the degree of quantum correlation in the steady state.

Main Results:

  • A plasmonic waveguide dynamically induces quantum correlation between NVCs.
  • This induced correlation can be preserved in the long-time steady state with local driving.
  • Significant quantum correlation is achievable even for NVCs separated by distances much larger than their wavelength.

Conclusions:

  • Local driving can stabilize dynamically induced quantum correlations between distant NVCs.
  • This scheme offers a pathway for decoherence-immune solid-state quantum devices.
  • It paves the way for long-distance NVC-based quantum networks utilizing plasmonic quantum electrodynamics.