Quantification of Quantum Entanglement in a Multiparticle System of Two-Level Atoms Interacting with a Squeezed Vacuum State of the Radiation Field

TL;DR

This paper quantifies multiparticle quantum entanglement in a large system of two-level atoms interacting with a squeezed vacuum field, analyzing how entanglement varies with atom number and field parameters.

Contribution

It provides a detailed analysis of quantum entanglement among up to 100 atoms in a squeezed vacuum, highlighting the continuous variation with atom number and field parameters.

Findings

Entanglement varies continuously with atom number and field parameters.

Multiparticle correlations are composed of all bipartite correlations among atoms.

Quantified entanglement for systems up to 100 atoms.

Abstract

We quantify multiparticle quantum entanglement in a system of N two-level atoms interacting with a squeezed vacuum state of the electromagnetic field. We calculate the amount of quantum entanglement present among one hundred such two-level atoms and also show the variation of that entanglement with the radiation field parameter. We show the continuous variation of the amount of quantum entanglement as we continuously increase the number of atoms from N=2 to N=100. We also discuss that the multiparticle correlations among the N two-level atoms are made up of all possible bipartite correlations among the N atoms.