Checking the second law at cosmic scales

Abstract

Based on recent data about the history of the Hubble factor, it is argued that the second law of thermodynamics holds at the largest scales accessible to observation. This is consistent with previous studies of the same question.

arXiv comment11 pages, 7 sets of figures, version accepted for publication in JCAP

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Model-independent cosmological inference post DESI DR1 BAO measurements
• Non-parametric reconstruction of cosmological observables using Gaussian Processes Regression
• Analytical Gaussian Process Cosmography: Unveiling Insights into Matter-Energy Density Parameter at Present
• A possible late-time transition of $M_B$ inferred via neural networks
• A comprehensive data-driven odyssey to explore the equation of state of dark energy
• Thermodynamics of the Primordial Universe
• Model-independent calibration of Gamma-Ray Bursts with neural networks