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Source of triggered entangled photon pairs? (Reply)

Author

Listed:
  • R. Mark Stevenson

    (Toshiba Research Europe)

  • Robert J. Young

    (Toshiba Research Europe
    Cavendish Laboratory, University of Cambridge)

  • Paola Atkinson

    (Cavendish Laboratory, University of Cambridge)

  • Ken Cooper

    (Cavendish Laboratory, University of Cambridge)

  • David A. Ritchie

    (Cavendish Laboratory, University of Cambridge)

  • Andrew J. Shields

    (Toshiba Research Europe)

Abstract

We have reported triggered photon-pair emission from single quantum dots that is suggestive of polarization entanglement1. Gilchrist et al. 2 criticize our analysis of the density matrix, claiming that the entanglement test is inappropriate. However, we show here that this analysis is in fact valid for an unpolarized source such as ours, and that this analysis (as well as alternative measures of entanglement) suggests that quantum-dot sources do emit entangled photons, and that their quality is rapidly improving3.

Suggested Citation

  • R. Mark Stevenson & Robert J. Young & Paola Atkinson & Ken Cooper & David A. Ritchie & Andrew J. Shields, 2007. "Source of triggered entangled photon pairs? (Reply)," Nature, Nature, vol. 445(7124), pages 5-6, January.
    • Handle: RePEc:nat:nature:v:445:y:2007:i:7124:d:10.1038_nature05547
    DOI: 10.1038/nature05547
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