Anomalous dip observed in intensity autocorrelation function as an inherent nature of single-photon emitters

TL;DR

This paper reports an anomalous antibunching dip in the intensity autocorrelation of a single-photon emitter, revealing quantum effects and improving the evaluation of multiphoton probabilities for quantum communication.

Contribution

It introduces a redefinition of the autocorrelation function considering population dynamics, enhancing the understanding of SPE quantum behavior.

Findings

Observation of an anomalous antibunching dip

Redefinition of autocorrelation function considering quantum dynamics

Improved assessment of multiphoton generation probabilities

Abstract

We report the observation of an anomalous antibunching dip in intensity autocorrelation function with photon correlation measurements on a single-photon emitter (SPE). We show that the anomalous dip observed is a manifestation of quantum nature of SPEs. Taking population dynamics in a quantum two-level system into account correctly, we redefine intensity autocorrelation function. This is of primary importance for precisely evaluating the lowest-level probability of multiphoton generation in SPEs toward realizing versatile pure SPEs for quantum information and communication.