Suitability vs. fidelity: Toward better measures of goodness for single-photon guns
G. Hockney, Pieter Kok, Jonathan P. Dowling · Frontiers in Optics · 2003
We propose a new measure, suitability, to assess the performance of single-photon guns in the context of specific applications. In particular, we demonstrate the requirements for applications to quantum key distribution (QKD) are quite different, and less stringent, than those for linear optical quantum computing.