Probing dynamical criticality near quantum phase transitions
Abstract
We reveal a prethermal temporal regime upon suddenly quenching to the vicinity of a quantum phase transition in the time evolution of 1D spin chains. The prethermal regime is analytically found to be self-similar, and its duration is governed by the ground-state energy gap. Based on analytical insights and numerical evidence, we show that this critically prethermal regime universally exists independently of the location of the probe site, the presence of weak interactions, or the initial state. Moreover, the resulting prethermal dynamics leads to an out-of-equilibrium scaling function of the order parameter in the vicinity of the transition.
Cite
@article{arxiv.2105.05986,
title = {Probing dynamical criticality near quantum phase transitions},
author = {Ceren B. Dağ and Yidan Wang and Philipp Uhrich and Xuesen Na and Jad C. Halimeh},
journal= {arXiv preprint arXiv:2105.05986},
year = {2023}
}
Comments
Revised with an analytical theory and improved presentation. Main text: 4 Pages, 2 Figures; Supplementary: 6 Pages, 5 Figures