A semiconductor source of triggered entangled photon pairs?

Details A semiconductor source of triggered entangled photon pairs? A semiconductor source of triggered entangled photon pairs?

2006-02-01

arxiv.org/abs/quant-ph/0602018v2

Nature 445, pE4 (2007)

Physics

Quantum Physics

5 pages in pre-print format, 1 table

Scientific paper

10.1038/nature05546

The realisation of a triggered entangled photon source will be of great importance in quantum information, including for quantum key distribution and quantum computation. We show here that: 1) the source reported in ``A semiconductor source of triggered entangled photon pairs''[1. Stevenson et al., Nature 439, 179 (2006)]} is not entangled; 2) the entanglement indicators used in Ref. 1 are inappropriate, relying on assumptions invalidated by their own data; and 3) even after simulating subtraction of the significant quantity of background noise, their source has insignificant entanglement.

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