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Precision calculation of universal amplitude ratios in $O(N)$ universality classes: Derivative Expansion results at order $\mathcal{O}(\partial^4)$

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arxiv 2109.14731 v2 pith:KYWPN55V submitted 2021-09-29 cond-mat.stat-mech hep-th

classification cond-mat.stat-mechhep-th
keywords computationcriticalderivativeexpansionamplitudegroupmathcalnon-perturbative
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

In the last few years the derivative expansion of the Non-Perturbative Renormalization Group has proven to be a very efficient tool for the precise computation of critical quantities. In particular, recent progress in the understanding of its convergence properties allowed for an estimate of the error bars as well as the precise computation of many critical quantities. In this work we extend previous studies to the computation of several universal amplitude ratios for the critical regime of $O(N)$ models using the derivative expansion of the Non-Perturbative Renormalization Group at order $\mathcal{O}(\partial^4)$ for three dimensional systems.

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