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arXiv · 2605.22199

Equation of State at High Baryon Densities from a Thermodynamically Informed Neural Network

Musfer Adzhymambetov
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Abstract

We present a four-dimensional equation of state for strongly interacting matter at finite temperature and conserved charge densities, constructed using a deep neural network. It is designed for direct use in hybrid models of relativistic heavy-ion collisions: it reproduces hadron resonance gas thermodynamics at typical particlization scales, is consistent with lattice QCD at low baryon chemical potential, and extrapolates into the high-density region inaccessible to either approach, which is precisely the regime targeted by RHIC BES, FAIR, HADES, and CBM. Thermodynamic consistency throughout the full phase space is enforced via a physics-informed loss function. We demonstrate the developed equation of state by implementing it at zero net strangeness and fixed electric-to-baryon charge ratio within the integrated hydrokinetic model.

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Musfer Adzhymambetov. 2026-05-21. Equation of State at High Baryon Densities from a Thermodynamically Informed Neural Network. https://arxiv.org/abs/2605.22199

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