Skip to main content
SpringerLink
Log in

Quantum Information

Source of triggered entangled photon pairs?

  • Brief Communications Arising
  • Published:

From Nature

View current issue Submit your manuscript

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, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

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

Author notes

  1. Kevin J. Resch

    Present address: Department of Physics and Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada

Authors and Affiliations

  1. Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane, 4072, Queensland, Australia

    Alexei Gilchrist, Kevin J. Resch & Andrew G. White

Authors
  1. Alexei Gilchrist
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kevin J. Resch
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Andrew G. White
    View author publications

    You can also search for this author in PubMed Google Scholar

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

  • Springer Nature Limited

This article is cited by

Search

Navigation