Source: wikibot/bures-metric
= Bures metric
{wiki=Bures_metric}
The Bures metric is a distance measure that is used in the context of quantum information theory and differentiates quantum states. It is derived from the Fubini-Study metric, which is a Riemannian metric on the complex projective space. The Bures metric quantifies how "far apart" two quantum states are in terms of their purity and distinguishability.