Correlation measurements with on-off detectors

TL;DR

This paper introduces a comprehensive method for detecting nonclassical light using on-off detectors, enabling the measurement of higher order and multi-mode correlations to identify quantum properties in various radiation fields.

Contribution

The paper develops a general framework for using on-off detectors to measure nonclassical correlations, including higher order, multi-mode, and space-time correlations, extending previous techniques.

Findings

Effective detection of nonclassical radiation fields.

Characterization of quantum correlations through on-off detector statistics.

Application to multi-mode and nonlinear detection scenarios.

Abstract

We present a general method to detect nonclassical radiation fields with systems of on-off detectors. We especially study higher order correlations for the identification of nonclassical radiation. This allows us to directly characterize quantum correlations by the statistics measured with systems of on-off detectors. Additionally, we generalize our method to multiple detector systems for measurements of correlations between light fields. We also consider multi-mode radiation fields and isolate nonclassicality in terms of the space time correlations. Finally, we present results for the quantum statistics using on-off detectors operating in nonlinear detection modes.