More entanglement implies higher performance in tailored channel discrimination tasks

TL;DR

This paper demonstrates that higher entanglement in quantum states enhances performance in channel discrimination tasks, with the advantage quantitatively linked to the state's degree of entanglement.

Contribution

It establishes a direct quantitative relationship between entanglement measures and discrimination performance, highlighting the importance of entanglement quality.

Findings

Entangled states outperform separable states in channel discrimination.

Degree of entanglement correlates with discrimination advantage.

Robustness measures quantify the entanglement-performance link.

Abstract

We show that every entangled state provides an advantage in bi- and multi-channel discrimination that singles out its degree of entanglement, quantified in terms of its Schmidt number and of the corresponding robustness measures.