Optimal estimation of an observable's expectation value for pure states for general measure of deviation

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118416We investigate the optimal estimation of quantum expectation value of a physical observable, which minimizes a mean error with respect to general measure of deviation, when a finite number of copies of a pure state are prepared. If pure sates are uniformly distributed, the minimum value of mean error for any measure of deviation is achieved by projective measurement on each copy.5 pages, 1 figureQuantum PhysicsOptimal estimation of an observable's expectation value for pure states for general measure of deviationtext