3 papers
astro-ph.CO2026
Field-level vs summaries: convergence of information in non-Gaussian density fields
Ivana Nikolac, Fabian Schmidt, Beatriz Tucci
We elucidate the sources of information gain in weakly non-Gaussian cosmological fields at the field- vs. summary-statistic-level in a controlled setting. Specifically, we compare…
astro-ph.CO2026
On the Relation Between Field-Level Posteriors, Correlators, and their Likelihoods
Massimo Pietroni, Fabian Schmidt
We develop a field-level posterior for cosmological data by marginalizing over initial conditions and noise in a general forward model. While our focus is on large-scale structure…
astro-ph.CO2025
Forward vs Backward: Improving BAO Constraints with Field-Level Inference
Ivana Babić, Fabian Schmidt, Beatriz Tucci
We present results of field-level inference of the baryon acoustic oscillation (BAO) scale on rest-frame dark matter halo catalogs. Our field-level constraint on is obt…