Publikation:

Spin qubits in graphene quantum dots

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0611252v2.pdf
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2007

Autor:innen

Trauzettel, Björn
Bulaev, Denis V.
Loss, Daniel

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-91081
DOI (zitierfähiger Link)
https://doi.org/10.1038/nphys544
ArXiv-ID
http://arxiv.org/abs/cond-mat/0611252

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Open Access Green

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Physik: Publikationen
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Published

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Nature Physics. 2007, 3, pp. 192-196. Available under: doi: 10.1038/nphys544

Zusammenfassung

We propose how to form spin qubits in graphene. A crucial requirement to achieve this goal is to find quantum dot states where the usual valley degeneracy in bulk graphene is lifted. We show that this problem can be avoided in quantum dots based on ribbons of graphene with semiconducting armchair boundaries. For such a setup, we find the energies and the exact wave functions of bound states, which are required for localized qubits. Additionally, we show that spin qubits in graphene can not only be coupled between nearest neighbor quantum dots via Heisenberg exchange interaction but also over long distances. This remarkable feature is a direct consequence of the quasi-relativistic spectrum of graphene.

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530 Physik

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ISO 690TRAUZETTEL, Björn, Denis V. BULAEV, Daniel LOSS, Guido BURKARD, 2007. Spin qubits in graphene quantum dots. In: Nature Physics. 2007, 3, pp. 192-196. Available under: doi: 10.1038/nphys544
BibTex
@article{Trauzettel2007qubit-5344,
  year={2007},
  doi={10.1038/nphys544},
  title={Spin qubits in graphene quantum dots},
  volume={3},
  journal={Nature Physics},
  pages={192--196},
  author={Trauzettel, Björn and Bulaev, Denis V. and Loss, Daniel and Burkard, Guido}
}
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