Bound on optimal local discrimination of bipartite quantum states

Donghoon Ha, Jeong San Kim

Published 2021-12-29, updated 2022-03-11Version 2

We consider the optimal discrimination of bipartite quantum states and provide an upper bound for the maximum success probability of optimal local discrimination. We also provide a necessary and sufficient condition for a measurement to realize the upper bound. We further establish a necessary and sufficient condition for this upper bound to be saturated. Finally, we illustrate our results using an example.