# Two-photon interference from two blinking quantum emitters

## TL;DR

This paper studies how blinking in quantum emitters affects two-photon interference measurements, revealing that blinking significantly alters correlation statistics and must be accounted for to accurately assess photon indistinguishability.

## Contribution

It demonstrates that blinking impacts two-photon interference measurements and proposes a method to recognize blinking effects through correlation function deviations.

## Key findings

- Blinkings significantly alter g^{(2)}(τ) statistics.
- Deviations from g^{(2)}_D(0)=0.5 indicate blinking presence.
- Blinking necessitates cross-checks for accurate photon indistinguishability estimation.

## Abstract

We investigate the effect of blinking on the two-photon interference measurement from two independent quantum emitters. We find that blinking significantly alters the statistics in the second-order intensity correlation function g$^{(2)}(\tau)$ and the outcome of two-photon interference measurements performed with independent quantum emitters. We theoretically demonstrate that the presence of blinking can be experimentally recognized by a deviation from the g$^{(2)}_{D}(0)=0.5$ value when distinguishable photons impinge on a beam splitter. Our results show that blinking imposes a mandatory cross-check measurement to correctly estimate the degree of indistinguishablility of photons emitted by independent quantum emitters.