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arXiv · 2510.15016

Adiabatic hydrodynamization and quasinormal modes of nonthermal attractors

Matisse De Lescluze·Michal P. Heller·Aleksas Mazeliauskas·Bruno Scheihing-Hitschfeld·Clemens Werthmann
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Abstract

Nonthermal attractors govern the emergent self-similar dynamics of far-from-equilibrium quantum systems, from ultrarelativistic nuclear collisions to cold-atom experiments. Within the framework of adiabatic hydrodynamization, the approach to a nonthermal attractor is described by the decay of excited states of an effective Hamiltonian. Using an exactly solvable kinetic theory -- the longitudinally expanding, overoccupied gluon plasma dominated by small-angle elastic scattering -- we establish a direct correspondence between the eigenmodes of adiabatic hydrodynamization and the quasinormal mode spectrum of the nonthermal attractor. This equivalence suggests a general framework for identifying universal dynamical structures in nonequilibrium systems. As a byproduct, we derive analytic prescaling solutions for strongly longitudinally expanding systems.

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Matisse De Lescluze, Michal P. Heller, Aleksas Mazeliauskas, Bruno Scheihing-Hitschfeld, Clemens Werthmann. 2025-10-16. Adiabatic hydrodynamization and quasinormal modes of nonthermal attractors. https://doi.org/10.1103/262r-xh1p

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