Mechanically induced spin resonance in a carbon nanotube

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2014
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Physical Review / B. 2014, 90(3), 035415. ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.90.035415
Zusammenfassung

The electron spin is a promising qubit candidate for quantum computation and quantum information. Here we propose and analyze a mechanically induced single electron spin resonance, which amounts to a rotation of the spin about the x axis in a suspended carbon nanotube. The effect is based on the coupling between the spin and the mechanical degree of freedom due to the intrinsic curvature-induced spin-orbit coupling. A rotation about the z axis is obtained by the off-resonant external electric driving field. Arbitrary-angle rotations of the single-electron spin about any axis in the x-z plane can be obtained with a single operation by varying the frequency and the strength of the external electric driving field. With multiple steps combining the rotations about the x and z axes, arbitrary-angle rotations about arbitrary axes can be constructed, which implies that any single-qubit gate of the electron-spin qubit can be performed. We simulate the system numerically by using a master equation with realistic parameters.

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ISO 690WANG, Heng, Guido BURKARD, 2014. Mechanically induced spin resonance in a carbon nanotube. In: Physical Review / B. 2014, 90(3), 035415. ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.90.035415
BibTex
@article{Wang2014Mecha-29084,
  year={2014},
  doi={10.1103/PhysRevB.90.035415},
  title={Mechanically induced spin resonance in a carbon nanotube},
  number={3},
  volume={90},
  issn={0163-1829},
  journal={Physical Review / B},
  author={Wang, Heng and Burkard, Guido},
  note={Article Number: 035415}
}
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    <dcterms:abstract xml:lang="eng">The electron spin is a promising qubit candidate for quantum computation and quantum information. Here we propose and analyze a mechanically induced single electron spin resonance, which amounts to a rotation of the spin about the x axis in a suspended carbon nanotube. The effect is based on the coupling between the spin and the mechanical degree of freedom due to the intrinsic curvature-induced spin-orbit coupling. A rotation about the z axis is obtained by the off-resonant external electric driving field. Arbitrary-angle rotations of the single-electron spin about any axis in the x-z plane can be obtained with a single operation by varying the frequency and the strength of the external electric driving field. With multiple steps combining the rotations about the x and z axes, arbitrary-angle rotations about arbitrary axes can be constructed, which implies that any single-qubit gate of the electron-spin qubit can be performed. We simulate the system numerically by using a master equation with realistic parameters.</dcterms:abstract>
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