Factorizability of optimal quantum sequence discrimination under maximum-confidence measurements
Abstract
We consider the discrimination of quantum sequences under maximum-confidence measurements and show that the optimal discrimination of a quantum sequence ensemble can always be factorized into that of each individual ensemble. In other words, the optimal quantum sequence discrimination under maximum-confidence measurements can be achieved just by performing a maximum-confidence discrimination independently at each step of the quantum sequence. We also show that the maximum confidence of identifying a quantum sequence is to achieve the maximum confidence of identifying each state comprising the quantum sequence. We further provide a necessary and sufficient condition for the optimal quantum state discrimination under maximum-confidence measurements.
Keywords
Cite
@article{arxiv.2510.20311,
title = {Factorizability of optimal quantum sequence discrimination under maximum-confidence measurements},
author = {Donghoon Ha and Jeong San Kim},
journal= {arXiv preprint arXiv:2510.20311},
year = {2026}
}
Comments
19 pages, 1 figure