Directional entanglement of spin-orbit locked nitrogen-vacancy centers by magnons

Zhiping Xue; Ji Zou; Chengyuan Cai; Gerrit E. W. Bauer; Tao Yu

Directional entanglement of spin-orbit locked nitrogen-vacancy centers by magnons

Mesoscale and Nanoscale Physics 2025-07-22 v2

Authors: Zhiping Xue , Ji Zou , Chengyuan Cai , Gerrit E. W. Bauer , Tao Yu

Abstract

We address that the stray magnetic field emitted by the excited quantum states of the nitrogen-vacancy (NV) centers is spin-momentum locked, such that the spin transfer to nearby ferromagnetic nanostructures is unidirectional. This may allow the controlled excitation of propagating magnons by NV centers in diamond. A pair of NV spin qubits exchange virtual magnons in a magnetic nanowire in a chiral manner that leads to directional quantum entanglement. A magnon-based ``quantum-entanglement isolator" should be a useful device in future quantum information technology.

Keywords

nitrogen-vacancy center magnon quantum entanglement spin-momentum locking directional entanglement

Cite

@article{arxiv.2505.07325,
  title  = {Directional entanglement of spin-orbit locked nitrogen-vacancy centers by magnons},
  author = {Zhiping Xue and Ji Zou and Chengyuan Cai and Gerrit E. W. Bauer and Tao Yu},
  journal= {arXiv preprint arXiv:2505.07325},
  year   = {2025}
}

Comments

14 pages, 7 figures

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