Measurement of sub-shot-noise spatial correlations without subtraction of background

TL;DR

This paper reports the first measurement of sub-shot-noise spatial correlations without background subtraction, advancing the potential for sub-shot-noise imaging of weak objects in quantum optics.

Contribution

It introduces a novel method to measure sub-shot-noise correlations directly, eliminating the need for background subtraction.

Findings

First direct measurement of sub-shot-noise spatial correlations

Demonstrates potential for improved imaging of weak objects

Advances quantum imaging techniques

Abstract

In this paper we present the first measurement of sub-shot-noise spatial correlations without any subtraction of background, a result opening the way to realize sub-shot-noise imaging of weak objects