Fubini–Study metric
= Fubini–Study metric
{wiki=Fubini–Study_metric}
The Fubini–Study metric is a Riemannian metric defined on complex projective space, specifically on the projective Hilbert space \\( \\mathbb\{CP\}^n \\). It is often used in the context of quantum mechanics and quantum information theory as it provides a way to measure distances and angles between quantum states represented as rays in complex projective space.