Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • News & Views
  • Published:

Quantum information

Blockade at a different level

Nature Nanotechnology volume 7, pages 617–619 (2012)Cite this article

Subjects

Valley degeneracy in carbon nanostructures can be detrimental to electron spin control and readout based on spin blockade. As a way around this problem, it is now shown how to use a combined valley–spin blockade instead.

This is a preview of subscription content, access via your institution

Access options

Buy this article

  • Purchase on Springer Link
  • Instant access to full article PDF
Buy now

Prices may be subject to local taxes which are calculated during checkout

Figure 1: Energy landscape in a double quantum dot filled with two electrons (blue dots), for example, in a carbon nanotube.
Figure 2: The effective magnetic field Beff in a bent nanotube is the sum of the external field Bx and a field produced by the spin–orbit interaction BSO (ref. 4).

References

  1. Loss, D. & DiVincenzo, D. P. Phys. Rev. A 57, 120–126 (1998).

    Article  CAS  Google Scholar 

  2. Hanson, R., Kouwenhoven, L. P., Petta, J. R., Tarucha, S. & Vandersypen, L. M. K. Rev. Mod. Phys. 79, 1217–1265 (2007).

    Article  CAS  Google Scholar 

  3. DiVincenzo, D. P. Fortschritte der Physik 48, 771–783 (2000).

    Article  Google Scholar 

  4. Pei, F., Laird, E. A., Steele, G. A. & Kouwenhoven, L. P. Nature Nanotech. 7, 630–634 (2012).

    Article  CAS  Google Scholar 

  5. Pályi, A. & Burkard, G. Phys. Rev. B 82, 155424 (2010).

    Article  Google Scholar 

  6. Churchill, H. O. H. et al. Nature Phys. 5, 321–326 (2009).

    Article  CAS  Google Scholar 

  7. Churchill, H. O. H. et al. Phys. Rev. Lett. 102, 166802 (2009).

    Article  CAS  Google Scholar 

  8. Kuemmeth, F., Ilani, S., Ralph, D. C. & McEuen, P. L. Nature 452, 448–452 (2008).

    Article  CAS  Google Scholar 

  9. Flensberg, K. & Marcus, C. M. Phys. Rev. B 81, 195418 (2010).

    Article  Google Scholar 

  10. Pályi, A. & Burkard, G. Phys. Rev. Lett. 106, 086801 (2011).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Guido Burkard is at the Department of Physics, University of Konstanz, D-76457 Konstanz, Germany,

    Guido Burkard

Authors
  1. Guido Burkard
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Guido Burkard.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Burkard, G. Blockade at a different level. Nature Nanotech 7, 617–619 (2012). https://doi.org/10.1038/nnano.2012.174

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/nnano.2012.174

Search

Advanced search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing