Detection of photon statistics and multimode field correlations by Raman processes

Glauber's g((2))-function provides a common measure of quantum field statistics through two-photon coincidence counting in Hanbury Brown-Twiss measurements. Here, we propose to use nonlinear optical signals as a tool for the characterization of quantum light. In particular, we show that Raman measurements provide an alternative direct probe for a different component of the four-point correlation function underlying the g((2))-function. We illustrate this capacity for a specific quantum state obtained from a frequency conversion process. Our work points out how the analysis of controlled optical nonlinear processes can provide an alternative window toward the analysis of quantum light sources.

Automated summary

The study proposes using nonlinear optical signals for the characterization of quantum light. Raman measurements serve as an alternative direct probe for a different component of the four-point correlation function underlying the g((2))-function. This work demonstrates how controlled optical nonlinear processes can offer an alternative perspective on analyzing quantum light sources.