Spin-polarized plasmon in ferromagnetic metals

Chao Yang, Zheng-Chuan Wang and Gang Su

Physica A: Statistical Mechanics and its Applications, 2021, vol. 575, issue C

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.

Keywords: Plasmon; Spin-polarized; Quantum information; Boltzmann equation (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:575:y:2021:i:c:s0378437121003162

DOI: 10.1016/j.physa.2021.126043

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