Photons ‘Photocopied’ for Quantum Computing
GAITHERSBURG, Md., Nov. 3, 2011 — Photon particles from two disparate sources have been rendered indistinguishable without losing their essential quantum properties, suggesting, in principle, that they can connect different types of hardware devices into a single quantum information network and communicate effectively.
[1] A single photon is produced by a quantum dot (QD). Simultaneously, a pair of photons is produced by a parametric down-conversion crystal (PDC). [2] One of the PDC photons, which has characteristics...