Skip to main content

Thank you for visiting 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:

Nonlinear dynamics

Quantum pendula locked in

A study of the autoresonant behaviour of a superconducting pendulum reveals that quantum fluctuations determine only the initial oscillator motion and not its subsequent dynamics. This could be important in the development of more efficient methods for reading solid-state qubits.

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

Access options

Buy this article

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

Figure 1: Illustration of the principle of measurement using autoresonance.


  1. Murch, K. W. et al. Nature Phys. 7, 105–108 (2011).

    Article  ADS  Google Scholar 

  2. Campbell, D. K. in From Cardinals to Chaos: Reflection on the Life and Legacy of Stanislaw Ulam (ed. Cooper, N. G., Eckhardt, R. & Shera, N.) (Cambridge Univ. Press, 1989).

    Google Scholar 

  3. Aldridge, J. S. & Cleland, A. N. Phys. Rev. Lett. 94, 156403 (2005).

    Article  ADS  Google Scholar 

  4. Mallet, F. et al. Nature Phys. 5, 791–795 (2009).

    Article  ADS  Google Scholar 

  5. Barth, I., Friedland, L., Sarid, E. & Shagalov, A. G. Phys. Rev. Lett. 103, 155001 (2009).

    Article  ADS  Google Scholar 

  6. Naaman, O., Aumentado, J., Friedland, L., Wurtele, J. S. & Siddiqi, I. Phys. Rev. Lett. 101, 117005 (2008).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Rights and permissions

Reprints and permissions

About this article

Cite this article

Lupascu, A. Quantum pendula locked in. Nature Phys 7, 100–101 (2011).

Download citation

  • Published:

  • Issue Date:

  • DOI:


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