Pablo Villegas
Statistical physics · Complex systems

Critical Collective Phenomena

Renormalization and multiscale structure in heterogeneous systems.
Enrico Fermi Research Center · Institute Carlos I (iC1)  ·  Publications  ·  CV
Research
01

Renormalization and Multiscale Theory

The Laplacian Renormalization Group: spectral coarse-graining of networks and heterogeneous structures, and the scaling laws that emerge from it.

02

Criticality and Disorder

Griffiths phases, rare regions, frustration and non-ergodic dynamics in disordered and signed systems.

03

Natural and Artificial Systems

Brain dynamics, tropical forests, epidemic spreading and learning architectures as testbeds for multiscale principles.

I am a research scientist at the Enrico Fermi Research Center (CREF) in Rome, also affiliated with the Institute Carlos I (iC1) in Granada, working at the interface of statistical physics and complex systems. My work asks how structure and disorder shape critical collective behavior, combining multiscale theory with data from real systems.

Selected papers
2026
Is higher-order physics different?Preprint
P. Villegas & S. Meloni · arXiv:2609.20759
2025
Networks with many structural scales: a Renormalization Group perspective
A. Poggialini, P. Villegas, M. A. Muñoz & A. Gabrielli · Phys. Rev. Lett. 134, 057401
2023
Laplacian Renormalization Group for heterogeneous networksCoverNews & Views
P. Villegas, T. Gili, G. Caldarelli & A. Gabrielli · Nat. Phys. 19, 445-450

All publications →

Contact

Email:

Enrico Fermi Research Center, Via Panisperna 89A, 00184 Rome, Italy