# Candidates for Universal Measures of Multipartite Entanglement

## TL;DR

This paper proposes new universal measures for multipartite entanglement, notably the ent-concurrence and absolute ent-concurrence, which detect and distinguish various entanglement types in complex quantum systems.

## Contribution

It introduces the ent-concurrence and absolute ent-concurrence as novel measures capable of capturing all entanglement correlations in multipartite quantum states.

## Key findings

- Ent-concurrence detects all entanglement correlations.
- Ent-concurrence distinguishes different types of multipartite entanglement.
- Absolute ent-concurrence detects entanglement in reduced states.

## Abstract

We propose and examine several candidates for universal multipartite entanglement measures. The most promising candidate for applications needing entanglement in the full Hilbert space is the ent-concurrence, which detects all entanglement correlations while distinguishing between different types of distinctly multipartite entanglement, and simplifies to the concurrence for two-qubit mixed states. For applications where subsystems need internal entanglement, we develop the absolute ent-concurrence which detects the entanglement in the reduced states as well as the full state.