A semiconductor source of triggered entangled photon pairs?
arXiv:quant-ph/0602018 · doi:10.1038/nature05546
Abstract
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.
5 pages in pre-print format, 1 table
References in corpus (8)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Mixed State Entanglement and Quantum Error Correction
- Separability Criterion for Density Matrices
- Distributed Entanglement
- On the Measurement of Qubits
- Maximizing the entanglement of two mixed qubits
- Improved fidelity of triggered entangled photons from single quantum dots
- Exploring Hilbert Space: accurate characterisation of quantum information