Author

O. Philcox

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Preprint Oct 2026

Constraints on Primordial Oscillatory Features from the Power Spectrum and Bispectrum of Redshift-Space Galaxy Clustering in DESI DR1

We constrain oscillatory features in the primordial power spectrum using the public DESI DR1 galaxy and quasar clustering data. Our analysis is based on a custom pipeline for the redshift-space power spectrum and bispectrum of the six main DESI DR1 tracers, modeled with the Lagrangian effective field theory,which provi...

Shi-Fan Chen, A. Chudaykin, Mikhail M. Ivanov et al. · 0 citations

Preprint Sep 2026

$w_0w_a$ or $bc$: DESI constraints on relative baryon-CDM perturbations

We carry out a search for the relative baryon-cold dark matter (CDM) density and velocity modes in the DESI full-shape (FS) data, and investigate whether DESI's preference for evolving dark energy can be affected by these relative perturbations, which are a known contaminant of the baryon acoustic oscillations. For the...

Ananda F. Smith, Mikhail M. Ivanov, R. de Belsunce et al. · 0 citations

#machine learning Review Jul 2026

Emulating Cosmic Structure Formation with a Lagrangian Neural Cellular Automaton

The LNCA is introduced, a hybrid deep learning framework that can be applied to emulate structure formation as a local, iterative dynamical process on a comoving lattice, and constrain the model to produce complete trajectories, not just final states, by adopting an equivariant cellular automaton architecture.

Cooper Jacobus, Beatriz Tucci, O. Philcox · arXiv.org · 0 citations