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 gravity

Physics from geometry

Two recent developments suggest how familiar properties of gravity and matter may emerge from the quantum geometry that underlies loop quantum gravity.

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

Access options

Rent or buy this article

Get just this article for as long as you need it


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

Figure 1: Is space loopy? In loop quantum gravity, space is fundamentally discrete and continuum is only an approximation.



  1. Rovelli, C. Phys. Rev. Lett. (in the press); preprint at <> (2006).

  2. Bianchi, E., Modesto, L., Rovelli, C. & Speziale, S. Class. Quantum Grav. (in the press); preprint at <> (2006).

  3. Livine, E. & Speziale, S. Preprint at <> (2006).

  4. Bilson-Thompson, S. O. <Preprint at> (2005).

  5. Bilson-Thompson, S. O., Markopoulou, F. & Smolin, L. Preprint at <> (2006).

  6. Gleick, J. Genius: The Life and Science of Richard Feynman 382 (Patheon, New York, 1992).

    Google Scholar 

Download references

Author information

Authors and Affiliations


Rights and permissions

Reprints and Permissions

About this article

Cite this article

Ashtekar, A. Physics from geometry. Nature Phys 2, 725–726 (2006).

Download citation

  • Issue Date:

  • DOI:

This article is cited by


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