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.

Quantum physics

The path most travelled

Continuous tracking of the random trajectories of a superconducting quantum system as it evolves between two selected initial and final states has allowed researchers to determine the most probable path of the system. See Letter p.570

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

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Figure 1: Transmon trajectories.

Ref. 1


  1. Weber, S. J. et al. Nature 511, 570–573 (2014).

    Article  ADS  CAS  Google Scholar 

  2. Devoret, M. H. & Schoelkopf, R. J. Science 339, 1169–1174 (2013).

    Article  ADS  CAS  Google Scholar 

  3. You, J. Q. & Nori, F. Nature 474, 589–597 (2011).

    Article  ADS  CAS  Google Scholar 

  4. Haroche, S. & Raimond, J. M. Exploring the Quantum: Atoms, Cavities, and Photons (Oxford Univ. Press, 2006).

    Book  Google Scholar 

  5. Braginsky, V. B. & Khalili, F. Ya. Quantum Measurement (Cambridge Univ. Press, 1995).

    MATH  Google Scholar 

  6. Korotkov, A. N. Phys. Rev. B 60, 5737 (1999).

    Article  ADS  CAS  Google Scholar 

  7. Murch, K. W., Weber, S. J., Macklin, C. & Siddiqi, I. Nature 502, 211–214 (2013).

    Article  ADS  CAS  Google Scholar 

  8. Chantasri, A., Dressel, J. & Jordan, A. N. Phys. Rev. A 88, 042110 (2013).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Adrian Lupascu.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Lupascu, A. The path most travelled. Nature 511, 538–539 (2014).

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