Second-order Spatial Correlation in the Far-Field: Comparing Entangled and Classical Light Sources

We consider second-order spatial correlation with entangled and classical light in the far-field. The quantum theory of second-order spatial correlation is analyzed, and the role of photon statistics and detection mode in the second-order spatial correlation are discussed. Meanwhile, the difference of second-order spatial correlation with entangled and classical light sources is deduced. (c) 2015 Elsevier B.V. All rights reserved.