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Effort: a fast and differentiable emulator for the Effective Field Theory of the Large Scale Structure of the Universe

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arxiv 2501.04639 v1 pith:H3DYJKJV submitted 2025-01-08 astro-ph.CO astro-ph.IM

Effort: a fast and differentiable emulator for the Effective Field Theory of the Large Scale Structure of the Universe

classification astro-ph.CO astro-ph.IM
keywords efforteffectiveemulatorfieldtheorymethodsmontecarlosampled
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the official release of the EFfective Field theORy surrogaTe (Effort), a novel and efficient emulator designed for the Effective Field Theory of Large-Scale Structure (EFTofLSS). This tool combines state-of-the-art numerical methods and clever preprocessing strategies to achieve exceptional computational performance without sacrificing accuracy. To validate the emulator reliability, we compare Bayesian posteriors sampled using Effort via Hamiltonian MonteCarlo methods to the ones sampled using the widely-used pybird code, via the Metropolis-Hastings sampler. On a large-volume set of simulations, and on the BOSS dataset, the comparison confirms excellent agreement, with deviations compatible with MonteCarlo noise. Looking ahead, Effort is poised to analyze next-generation cosmological datasets and to support joint analyses with complementary tools.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Alleviating prior dependencies for DESI DR1 clustering fits through reparameterization

    astro-ph.CO 2026-07 unverdicted novelty 6.0

    Jeffreys prior over EFTofLSS coefficients mitigates projection effects in DESI DR1 power spectrum multipole fits, recentering posteriors for late-time expansion parameters.

  2. Alleviating prior dependencies for DESI DR1 clustering fits through reparameterization

    astro-ph.CO 2026-07 accept novelty 6.0

    A hybrid Jeffreys+baseline prior removes multi-σ prior-volume projection in DESI DR1 full-shape fits of H0, w0, and wa, yielding late-time expansion constraints consistent with HOD-informed Bayesian and frequentist analyses.

  3. Euclid preparation. XCVIII. Cosmology Likelihood for Observables in Euclid (CLOE). 5: Extensions beyond the standard modelling of theoretical probes and systematic effects

    astro-ph.CO 2025-10 conditional novelty 3.0

    CLOE has been extended to model magnification bias, massive neutrinos, and modified gravity for Euclid probes and validated via posterior sampling on synthetic data.