Building an entanglement measure on physical ground

TL;DR

This paper introduces a new physically motivated measure of multipartite entanglement for pure states, which is discriminant, monotone under LOCC, and expressible via system observables.

Contribution

The paper presents a novel entanglement measure grounded in physical observables, enhancing the understanding of multipartite entanglement.

Findings

The measure is discriminant and monotone under LOCC.

It can be expressed in terms of observable quantities.

Provides a practical way to quantify entanglement in experiments.

Abstract

We introduce on physical grounds a new measure of multipartite entanglement for pure states. The function we define is discriminant and monotone under LOCC and moreover can be expressed in terms of observables of the system.