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Spin-polarized plasmon in ferromagnetic metals

Author

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  • Yang, Chao
  • Wang, Zheng-Chuan
  • Su, Gang

Abstract

We exploit the spinor Boltzmann equation associated with Poisson equation to study the excitation of plasmons induced by electron–electron interactions in a ferromagnetic metal. Besides the collective excitation of spin-polarized charge density, we demonstrate the decoherence of such spin-polarized plasmons. By applying a rotating resonant magnetic field to the system, we obtain the long-lived coherent superposition state of spin-up and spin-down electrons, which can be used to construct qubits. We also investigate the interference of several spin-polarized plasmons controlled by their corresponding rotating magnetic fields, and find the entanglement between qubits. Our results show that a new quantum information processing route based on spin-polarized plasmons may be feasible.

Suggested Citation

  • Yang, Chao & Wang, Zheng-Chuan & Su, Gang, 2021. "Spin-polarized plasmon in ferromagnetic metals," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 575(C).
    • Handle: RePEc:eee:phsmap:v:575:y:2021:i:c:s0378437121003162
    DOI: 10.1016/j.physa.2021.126043
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    Cited by:

    1. Vito Coviello & Denis Badocco & Paolo Pastore & Martina Fracchia & Paolo Ghigna & Alessandro Martucci & Daniel Forrer & Vincenzo Amendola, 2024. "Accurate prediction of the optical properties of nanoalloys with both plasmonic and magnetic elements," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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