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arXiv · 2112.03015

Universal amplitudes ratios for critical aging via functional renormalization group

Michele Vodret·Alessio Chiocchetta·Andrea Gambassi
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Abstract

We discuss how to calculate non-equilibrium universal amplitude ratios in the functional renormalization group approach, extending its applicability. In particular, we focus on the critical relaxation of the Ising model with non-conserved dynamics (model A) and calculate the universal amplitude ratio associated with the fluctuation-dissipation ratio of the order parameter, considering a critical quench from a high-temperature initial condition. Our predictions turn out to be in good agreement with previous perturbative renormalization-group calculations and Monte Carlo simulations.

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Michele Vodret, Alessio Chiocchetta, Andrea Gambassi. 2021-12-06. Universal amplitudes ratios for critical aging via functional renormalization group. https://doi.org/10.1088/1751-8121%2Fac7182

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