Effect of electron spin-spin interaction on level crossings and spin flips in a spin-triplet system

Wei Jia, Fang-Qi Hu, Ning Wu, and Qing Zhao
Phys. Rev. A 96, 062507 – Published 15 December 2017

Abstract

We study level crossings and spin flips in a system consisting of a spin-1 (an electron spin triplet) coupled to a nuclear spin of arbitrary size K, in the presence of a uniform magnetic field and the electron spin-spin interaction within the triplet. Through an analytical diagonalization based on the SU(3) Lie algebra, we find that the electron spin-spin interaction not only removes the curious degeneracy which appears in the absence of the interaction, but also produces some level anticrossings (LACs) for strong interactions. The real-time dynamics of the system shows that periodic spin flips occur at the LACs for arbitrary K, which might provide an option for nuclear or electron spin polarization.

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  • Received 31 May 2017

DOI:https://doi.org/10.1103/PhysRevA.96.062507

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Wei Jia1,2, Fang-Qi Hu1, Ning Wu1, and Qing Zhao1,*

  • 1Center for Quantum Technology Research, School of Physics, Beijing Institute of Technology, Beijing 100081, China
  • 2Southwest Institute of Technical Physics, Chengdu 610041, China

  • *qzhaoyuping@bit.edu.cn

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Vol. 96, Iss. 6 — December 2017

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