Quantum information: Source of triggered entangled photon pairs?

Gilchrist, A., Resch, K. J. and White, A. G. (2007) Quantum information: Source of triggered entangled photon pairs?. Nature, 445 7124: E4-E5. doi:10.1038/nature05546

Author Gilchrist, A.
Resch, K. J.
White, A. G.
Title Quantum information: Source of triggered entangled photon pairs?
Journal name Nature   Check publisher's open access policy
ISSN 0028-0836
Publication date 2007-01-11
Sub-type Other
DOI 10.1038/nature05546
Open Access Status Not Open Access
Volume 445
Issue 7124
Start page E4
End page E5
Total pages 2
Editor Philip Campbell
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Subject C1
240402 Quantum Optics and Lasers
780102 Physical sciences
0105 Mathematical Physics
Abstract 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.
Keyword Quantum computation
Entangled photon
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Published in Brief Communication Arising section

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Created: Tue, 19 Feb 2008, 02:01:50 EST