Automatic Functional Differentiation in JAX

M Lin - The Twelfth International Conference on Learning …, 2023 - openreview.net
We extend JAX with the capability to automatically differentiate higher-order functions
(functionals and operators). By representing functions as infinite dimensional generalization …

Representation learning approach to probe for dynamical dark energy in matter power spectra

D Piras, L Lombriser - Physical Review D, 2024 - APS
We present DE-VAE, a variational autoencoder (VAE) architecture to search for a
compressed representation of dynamical dark energy (DE) models in observational studies …

DISCO-DJ I: a differentiable Einstein-Boltzmann solver for cosmology

O Hahn, F List, N Porqueres - Journal of Cosmology and …, 2024 - iopscience.iop.org
Abstract We present the Einstein-Boltzmann module of the Disco-Dj (DIfferentiable
Simulations for COsmology—Done with J ax) software package. This module implements a …

[HTML][HTML] Differentiable and accelerated spherical harmonic and Wigner transforms

MA Price, JD McEwen - Journal of Computational Physics, 2024 - Elsevier
Many areas of science and engineering encounter data defined on spherical manifolds.
Modelling and analysis of spherical data often necessitates spherical harmonic transforms …

The future of cosmological likelihood-based inference: accelerated high-dimensional parameter estimation and model comparison

D Piras, A Polanska, AS Mancini, MA Price… - arXiv preprint arXiv …, 2024 - arxiv.org
We advocate for a new paradigm of cosmological likelihood-based inference, leveraging
recent developments in machine learning and its underlying technology, to accelerate …

Learned harmonic mean estimation of the Bayesian evidence with normalizing flows

A Polanska, MA Price, D Piras, AS Mancini… - arXiv preprint arXiv …, 2024 - arxiv.org
We present the learned harmonic mean estimator with normalizing flows-a robust, scalable
and flexible estimator of the Bayesian evidence for model comparison. Since the estimator is …

Fast emulation of two-point angular statistics for photometric galaxy surveys

M Bonici, L Biggio, C Carbone… - Monthly Notices of the …, 2024 - academic.oup.com
We develop a set of machine-learning-based cosmological emulators, to obtain fast model
predictions for the C (ℓ) angular power spectrum coefficients, characterizing tomographic …

[HTML][HTML] 12× 2 pt combined probes: pipeline, neutrino mass, and data compression

A Reeves, A Nicola, A Refregier… - … of Cosmology and …, 2024 - iopscience.iop.org
With the rapid advance of wide-field surveys it is increasingly important to perform combined
cosmological probe analyses. We present a new pipeline for simulation-based multi-probe …

candl: cosmic microwave background analysis with a differentiable likelihood

L Balkenhol, C Trendafilova, K Benabed… - Astronomy & …, 2024 - aanda.org
We present candl, an automatically differentiable python likelihood for analysing cosmic
microwave background power spectrum measurements. candl is powered by JAX, which …

Assessment of Gradient-Based Samplers in Standard Cosmological Likelihoods

A Mootoovaloo, J Ruiz-Zapatero… - arXiv preprint arXiv …, 2024 - arxiv.org
We assess the usefulness of gradient-based samplers, such as the No-U-Turn Sampler
(NUTS), by comparison with traditional Metropolis-Hastings algorithms, in tomographic …