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- Title
Quantum Information: Source of triggered entangled photon pairs?
- Authors
Gilchrist, Alexei; Resch, Kevin J.; White, Andrew G.
- Abstract
Arising from: R. M. Stevenson et al. 439, 179–182 (2006); Stevenson et al. replyThe 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..
- Subjects
QUANTUM theory; PHOTON emission; SEMICONDUCTORS; POLARIZED photons; STEVENSON, R. M.; QUANTUM dots
- Publication
Nature, 2007, Vol 445, Issue 7124, p4
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/nature05546