Quantifying entanglement of two-qubit Werner states

TL;DR

This paper presents a practical framework for quantifying entanglement in two-qubit Werner states using symmetric informationally complete POVMs, accounting for Poisson noise, and evaluates its efficiency through numerical simulations.

Contribution

It introduces a novel measurement scheme for entanglement quantification that incorporates realistic noise conditions in Werner states.

Findings

Framework effectively quantifies entanglement under Poisson noise.

Numerical simulations demonstrate the scheme's efficiency across settings.

Method provides a practical approach for experimental entanglement measurement.

Abstract

In this article, we introduce a framework for entanglement quantification of photon pairs represented by two-qubit Werner states. The measurement scheme is based on the symmetric informationally complete POVM. To make the framework realistic, we impose the Poisson noise on the measured two-photon coincidences. For various settings, numerical simulations were performed to evaluate the efficiency of the framework.