Realization of GHZ-like and W-like Third-order Spatial Correlation with Classical Light

TL;DR

This paper presents a method to generate third-order spatial correlation states with classical light, mimicking quantum entanglement features, and can be extended to higher orders for exploring multi-partite correlations.

Contribution

The authors propose a phase modulation scheme to produce GHZ-like and W-like third-order spatial correlations with classical light, advancing the understanding of high-order classical spatial correlations.

Findings

Successfully generated GHZ-type and W-type correlations

Scheme can be generalized to N-order correlations

Provides new insights into classical multi-partite spatial correlations

Abstract

The spatial correlation with classical lights, which has some similar aspects as that with entangled lights, is an interesting and fundamentally important topic. But the features of high-order spatial correlation with classical lights are not well known, and the types of high-order correlations produced are of limit. Here, we propose a scheme to produce third-order spatial correlated states by modulating the phases of three laser beams. With the scheme we can produce Greenberger-Horne-Zeilinger-type (GHZ-type) and W-type spatial correlations with different phase modulations. Our scheme can be easily generalized to produce $N$-order spatial correlation states and to probe the aspects of different multi-partite spatial correlations.