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.

Quantum Information

Source of triggered entangled photon pairs?

Abstract

Arising from: R. M. Stevenson et al. Nature 439, 179–182 (2006)10.1038/nature04446; Stevenson et al. reply

The realization of an entangled photon source will be of great importance in quantum information — for example, for quantum key distribution and quantum computation — and Stevenson et al.1 have described such a source. However, we show here that first, their source is not entangled; second, they use inappropriate entanglement indicators that rely on assumptions invalidated by their data; and third, their source has insignificant entanglement even after simulating subtraction of the significant quantity of background noise. We therefore find that the standard of proof required for a semiconductor source of triggered entangled photon pairs has not been met by Stevenson et al.1.

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

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

References

  1. Stevenson, R. M. et al. Nature 439, 179–182 (2006).

    Article  ADS  CAS  Google Scholar 

  2. Bennett, C. H., DiVincenzo, D. P., Smolin, J. A. & Wootters, W. K. Phys. Rev. A 54, 3824–3851 (1996).

    Article  ADS  MathSciNet  CAS  Google Scholar 

  3. Wootters, W. K. Phys. Rev. Lett. 80, 2245–2248 (1998).

    Article  ADS  CAS  Google Scholar 

  4. Coffman, V., Kundu, J. & Wootters, W. K. Phys. Rev. A 61, 052306 (2000).

    Article  ADS  Google Scholar 

  5. White, A. G., James, D. F. V., Munro, W. J. & Kwiat, P. G. Phys. Rev. A 65, 012301 (2001).

    Article  ADS  Google Scholar 

  6. Peres, A. Phys. Rev. Lett. 77, 1413–1415 (1996).

    Article  ADS  MathSciNet  CAS  Google Scholar 

  7. James, D. F. V., Kwiat, P. G., Munro, W. J. & White, A. G. Phys. Rev. A 64, 052312 (2001).

    Article  ADS  Google Scholar 

  8. Munro, W. J., James, D. F. V., White, A. G. & Kwiat, P. G. Phys. Rev. A 64, 030302 (2001).

    Article  ADS  Google Scholar 

  9. Young, R. J. et al. N. J. Phys. 8, 29 (2006).

    Article  Google Scholar 

  10. Stokes, G. G. Trans. Camb. Phil. Soc. 9, 399–416 (1852).

    ADS  Google Scholar 

  11. Mandel, L. & Wolf, E. in Optical Coherence and Quantum Optics 353–354 (Cambridge University Press, Cambridge, 1995).

    Book  Google Scholar 

  12. Vasanelli, A., Ferreira, R. & Bastard, G. Phys. Rev. Lett. 89, 216804 (2002).

    Article  ADS  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Andrew G. White.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Gilchrist, A., Resch, K. & White, A. Source of triggered entangled photon pairs?. Nature 445, E4–E5 (2007). https://doi.org/10.1038/nature05546

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/nature05546

This article is cited by

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

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