Separation out of Entanglement

TL;DR

This paper explores how classical correlations influence the separability of quantum states, showing that increased classical dependence can expand the set of separable states in Werner-like models.

Contribution

It generalizes the classical component of Werner states to include correlations, revealing that classical dependence can enhance quantum state separability.

Findings

Separable region expands with classical correlation.

Classical dependence can increase quantum state separability.

Provides new insights into classical-quantum correlation interplay.

Abstract

We investigate the separability properties of quantum states described by an extended Werner density matrix, where the classical component exhibits statistical dependence. By generalizing the classical part to allow correlations, we demonstrate that within a specific parameter range the separable region expands compared to the standard Werner state with an independent classical component. This result suggests that increasing classical correlation can enhance the separability of the overall quantum state, providing new insights into the interplay between classical and quantum correlations.