Quantum Information

Source of triggered entangled photon pairs?

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

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Arising from: R. M. Stevenson et al. 439, 179-182 (2006); 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. 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..

Original languageEnglish
Pages (from-to)E4-E5
Number of pages2
JournalNature
Volume445
Issue number7124
DOIs
Publication statusPublished - 11 Jan 2007
Externally publishedYes

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