Experimental quantum imaging distillation with undetected light

TL;DR

This paper demonstrates an experimental quantum imaging technique that uses undetected light and is resilient to high noise levels, enabling high-quality imaging without coincidence detection.

Contribution

The authors introduce a novel noise-resilient quantum imaging distillation method based on interferometric modulation, enhancing image quality under extreme noise conditions.

Findings

Imaging quality remains high with noise levels up to 250 times the signal.

The method does not require coincidence detection, simplifying the setup.

Theoretical analysis supports the experimental results.

Abstract

Imaging based on the induced coherence effect makes use of photon pairs to obtain information of an object without detecting the light that probes it. While one photon illuminates the object, only its partner is detected, so no measurement of coincidence events are needed. The sought-after object's information is revealed observing a certain interference pattern on the detected photon. Here we demonstrate experimentally that this imaging technique can be made resilient to noise. We introduce an imaging distillation approach based on the interferometric modulation of the signal of interest. We show that our scheme can generate a high-quality image of an object even against noise levels up to 250 times the actual signal of interest. We also include a detailed theoretical explanation of our findings.