Entanglement measure using Wigner function: case of generalized vortex state formed by multiphoton subtraction

TL;DR

This paper explores using the negativity of the Wigner function as a measure of entanglement in generalized vortex states formed by multiphoton subtraction, comparing it with concurrence results.

Contribution

It introduces a novel entanglement measure based on Wigner function negativity for vortex states and compares it with traditional concurrence measures.

Findings

Wigner function negativity correlates with entanglement levels

The proposed measure captures quantum interference effects

Comparison shows consistency with concurrence results

Abstract

The negativity of the Wigner function is discussed as a measure of the non classicality and the quantum interference pattern obtained therein as a possible measure of the entanglement between the two modes of the vortex states. This measure of entanglement is compared with the results obtained from concurrence.