no code implementations • 16 Oct 2023 • Davide Piras, Lucas Lombriser
We present DE-VAE, a variational autoencoder (VAE) architecture to search for a compressed representation of dynamical dark energy (DE) models in observational studies of the cosmic large-scale structure.
1 code implementation • 31 Oct 2022 • Davide Piras, Hiranya V. Peiris, Andrew Pontzen, Luisa Lucie-Smith, Ningyuan Guo, Brian Nord
We develop the use of mutual information (MI), a well-established metric in information theory, to interpret the inner workings of deep learning models.
2 code implementations • 16 May 2022 • Davide Piras, Benjamin Joachimi, Francisco Villaescusa-Navarro
Producing thousands of simulations of the dark matter distribution in the Universe with increasing precision is a challenging but critical task to facilitate the exploitation of current and forthcoming cosmological surveys.
no code implementations • 16 Mar 2022 • Luisa Lucie-Smith, Hiranya V. Peiris, Andrew Pontzen, Brian Nord, Jeyan Thiyagalingam, Davide Piras
The additional dimension in the representation contains information about the infalling material in the outer profiles of dark matter halos, thus discovering the splashback boundary of halos without prior knowledge of the halos' dynamical history.
1 code implementation • 12 Jan 2021 • Davide Piras, Alessio Spurio Mancini, Ana M. G. Ferreira, Benjamin Joachimi, Michael P. Hobson
We train a machine learning algorithm on the power spectrum of the recorded pressure wave and show that the trained emulator allows complete and fast event locations for $\textit{any}$ source mechanism.
no code implementations • 23 Oct 2020 • Alex Mansbridge, Gregory Barbour, Davide Piras, Michael Murray, Christopher Frye, Ilya Feige, David Barber
In this work, our contributions are two-fold: first, by adapting state-of-the-art techniques from representation learning, we introduce a novel approach to learning LDP mechanisms.