Quantum Correlations in Three-Beam Symmetric Gaussian States Accessed via Photon-Number-Resolving Detection and Quantum Universal Invariants
Quantum Physics
2025-11-26 v2
Abstract
Quantum correlations of 3-beam symmetric Gaussian states are analyzed using their quantum universal invariants. These invariants, 1-, 2-, and 3-beam purities, are expressed in terms of the beams' intensity moments up to sixth order. The 3-beam symmetric Gaussian states with varying amounts of the noise are experimentally generated using entangled photon pairs from down-conversion, their invariants are determined, and their quantum correlations are quantified. The coexistence of bi- and tripartite entanglement and genuine tripartite entanglement are observed in these states that resemble the noisy GHZ/W states.
Keywords
Cite
@article{arxiv.2505.11303,
title = {Quantum Correlations in Three-Beam Symmetric Gaussian States Accessed via Photon-Number-Resolving Detection and Quantum Universal Invariants},
author = {Jan Peřina and Nazarii Sudak and Artur Barasiński and Antonín Černoch},
journal= {arXiv preprint arXiv:2505.11303},
year = {2025}
}
Comments
13 pages, 11 figues, supplemental material in file perinaSM.pdf