Related papers: Universality and weak-ergodicity breaking in quantum quenches

Universality and weak-ergodicity breaking in quantum quenches

URL: http://arxiv.org/abs/2511.08687v1
Date: Thu, 13 Nov 2025 01:02:13 GMT
Title: Universality and weak-ergodicity breaking in quantum quenches
Authors: Guido Giachetti, Andrea Solfanelli, Nicolò Defenu,
Abstract summary: We argue that the emergence of weak ergodicity breaking following quantum quenches is a direct consequence of lattice discretization.<n>We revisit two results in the literature on quantum $O(n)$ models, concerning universal scaling and equilibration, and demonstrate how these apparent contradictions can be resolved by properly accounting for lattice effects.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Sudden quenches in quantum many-body systems often lead to dynamical evolutions that unveil surprising physical behaviors. In this work, we argue that the emergence of weak ergodicity breaking following quantum quenches in certain local many-body systems is a direct consequence of lattice discretization. To support this claim, we investigate the out-of-equilibrium dynamics of quantum $O(n)$ models on a lattice. In doing so, we also revisit two puzzling results in the literature on quantum $O(n)$ models, concerning universal scaling and equilibration, and demonstrate how these apparent contradictions can be resolved by properly accounting for lattice effects.

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