Detection of transverse entanglement in phase space
  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. 
D. S. Tasca, S. P. Walborn, F. Toscano and P. H. Souto Ribeiro