A new entanglement measure based dual entropy

TL;DR

This paper introduces a novel dual entropy measure based on von Neumann entropy to quantify bipartite entanglement, revealing unique properties and inequalities in quantum entangled networks.

Contribution

It proposes a new dual entropy derived from Shannon entropy, defines $S^{t}$-entropy entanglement, and establishes a polygon inequality for multipartite entanglement.

Findings

Analytic formula for two-qubit systems.

Monogamy properties differ in high-dimensional systems.

New entanglement polygon inequality proved.

Abstract

Quantum entropy is an important measure for describing the uncertainty of a quantum state, more uncertainty in subsystems implies stronger quantum entanglement between subsystems. Our goal in this work is to quantify bipartite entanglement using both von Neumann entropy and its complementary dual. We first propose a type of dual entropy from Shannon entropy. We define $S^{t}$-entropy entanglement based on von Neumann entropy and its complementary dual. This implies an analytic formula for two-qubit systems. We show that the monogamy properties of the $S^{t}$-entropy entanglement and the entanglement of formation are inequivalent for high-dimensional systems. We finally prove a new type of entanglement polygon inequality in terms of $S^{t}$-entropy entanglement for quantum entangled networks. These results show new features of multipartite entanglement in quantum information processing.