Detection of transverse entanglement in phase space

TL;DR

This paper demonstrates both theoretically and experimentally that transverse entanglement between photon pairs can be detected in intermediate zones using only intensity correlation measurements, expanding the methods for entanglement detection.

Contribution

It introduces a novel approach for detecting transverse entanglement in intermediate zones solely through intensity correlation measurements, applicable across various physical systems.

Findings

Entanglement detection is possible in intermediate zones.

Intensity correlation measurements suffice for detection.

Method applicable to multiple physical systems.

Abstract

Transverse entanglement between pairs of photons can be detected through intensity correlation measurements in the near and far fields. We show theoretically and experimentally that at intermediate zones, it is also possible to detect transverse entanglement performing only intensity correlation measurements. Our results are applicable to a number of physical systems.