52 citations · 127 across the 5 of their papers we have counts for
5 papers
A comparison between best-fit eccentricity definitions and the standardized definition of eccentricity
Nicolas Chartier, Md Arif Shaikh, Hyung Mok Lee +1
In the absence of a unique, gauge-independent definition of eccentricity in General Relativity, there have been efforts to standardize the definition for Gravitational-Wave astrono…
LtU-ILI: An All-in-One Framework for Implicit Inference in Astrophysics and Cosmology
Matthew Ho, Deaglan J. Bartlett, Nicolas Chartier +12
This paper presents the Learning the Universe Implicit Likelihood Inference (LtU-ILI) pipeline, a codebase for rapid, user-friendly, and cutting-edge machine learning (ML) inferenc…
Bayesian Control Variates for optimal covariance estimation with pairs of simulations and surrogates
Nicolas Chartier, Benjamin D. Wandelt
Predictions of the mean and covariance matrix of summary statistics are critical for confronting cosmological theories with observations, not least for likelihood approximations an…
CARPool Covariance: Fast, unbiased covariance estimation for large-scale structure observables
Nicolas Chartier, Benjamin D. Wandelt
The covariance matrix of non-linear clustering statistics that are measured in current and upcoming surveys is of fundamental interest for comparing cosmological the…
CARPool: fast, accurate computation of large-scale structure statistics by pairing costly and cheap cosmological simulations
Nicolas Chartier, Benjamin Wandelt, Yashar Akrami +1
To exploit the power of next-generation large-scale structure surveys, ensembles of numerical simulations are necessary to give accurate theoretical predictions of the statistics o…