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.

Cosmology

Unique, or not unique?

That is the question. The search for a single theory of everything is as old as science itself, and is now the beat of quantum cosmologists. But some basic tenets that inform the quest are being challenged.

This is a preview of subscription content

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

Figure 1: Take it from the top.

References

  1. Kachru, S., Kallosh, R., Linde, A. & Trivedi, S. P. Phys. Rev. D 68, 046005 (2003).

    ADS  MathSciNet  Article  Google Scholar 

  2. Susskind, L. preprint available at www.arxiv.org/hep-th/0302219 (2003).

  3. Hawking, S. W. & Hertog, T. Phys. Rev. D 73, 123527 (2006).

    ADS  MathSciNet  Article  Google Scholar 

  4. Hartle, J. B. & Hawking, S. W. Phys. Rev. D 28, 2960–2975 (1983).

    ADS  MathSciNet  Article  Google Scholar 

  5. Vilenkin, A. Phys. Rev. D 30, 509–511 (1984).

    ADS  MathSciNet  Article  Google Scholar 

  6. Schiller, F. reprinted in Hist. Theor. 11, 321–334 (1972).

    Article  Google Scholar 

  7. Griffiths, R. J. Stat. Phys. 36, 219–272 (1984).

    ADS  Article  Google Scholar 

  8. Omnès, R. J. Stat. Phys. 53, 893–932 (1988).

    ADS  Article  Google Scholar 

  9. Gell-Mann, M. & Hartle, J. B. Phys. Rev. D 47, 3345–3382 (1993).

    ADS  MathSciNet  CAS  Article  Google Scholar 

  10. Joos, E. et al. Decoherence and the Appearance of a Classical World in Quantum Theory (Springer, Berlin, 2003).

    Book  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Bojowald, M. Unique, or not unique?. Nature 442, 988–989 (2006). https://doi.org/10.1038/442988a

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/442988a

Further reading

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