Phase Mapping as a Powerful Diagnostic of Primordial Non-Gaussianity

TL;DR

This paper introduces a new phase mapping technique using return maps to detect primordial non-Gaussian signals in the cosmic microwave background, offering a robust and powerful diagnostic tool.

Contribution

The paper presents a novel phase mapping method based on return maps, enhancing the detection of non-Gaussian signals in cosmological data.

Findings

The phase mapping method effectively identifies non-Gaussian signals.

It outperforms traditional morphological measures in robustness and power.

The technique is applicable to future CMB experiments.

Abstract

The identification and extraction of non-Gaussian signals is one of the main cosmological challenges facing future experimental measurements of the cosmic microwave background temperature pattern. We present a generalized statistical measure based on a novel technique representation of Fourier phases using the return map. We show that this method is both robust and powerful in comparison, for example, with morphological measures.