# Entanglement of multiphoton polarization Fock states and their superpositions

## TL;DR

This paper analyzes the entanglement properties of multiphoton polarization Fock states and their superpositions by expressing their density matrices through correlator matrices and evaluating entanglement across different parameters.

## Contribution

It introduces a unified matrix-based approach to represent pure and mixed multiphoton polarization states and assesses their entanglement characteristics.

## Key findings

- Entanglement varies with state parameters and reduction methods.
- Density matrices can be expressed via correlator matrices.
- The degree of entanglement is quantitatively evaluated.

## Abstract

Density matrices of pure multiphoton Fock polarization states and of arising from them reduced density matrices of mixed states are expressed in similar ways in terms of matrices of correlators defined as averaged products of equal numbers of creation and annihilation operators. Degree of entanglement of considered states is evaluated for various combinations of parameters of states and character of their reduction.