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Source of triggered entangled photon pairs?

Author

Listed:
  • Alexei Gilchrist

    (University of Queensland)

  • Kevin J. Resch

    (University of Queensland
    University of Waterloo)

  • Andrew G. White

    (University of Queensland)

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.

Suggested Citation

  • Alexei Gilchrist & Kevin J. Resch & Andrew G. White, 2007. "Source of triggered entangled photon pairs?," Nature, Nature, vol. 445(7124), pages 4-5, January.
    • Handle: RePEc:nat:nature:v:445:y:2007:i:7124:d:10.1038_nature05546
    DOI: 10.1038/nature05546
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