Chaos Emerge with Exceptional Points in Reset-Driven Floquet Dynamics
Abstract
We investigate the spectral structure of reset-driven Floquet quantum channels generated by the Hamiltonian evolution of a many-body system followed by periodic resetting of a bath. By tuning a chaos-controlling parameter in the underlying Hamiltonian, we uncover an exceptional-point-induced spectral transition from a symmetry-constrained ergodic regime to a fully chaotic regime. Across this transition, increasing the chaos parameter causes the real eigenvalues of the channel to drift, coalesce at exceptional points, and bifurcate into complex-conjugate pairs, signaling the progressive breaking of symmetry constraints in operator space. We further show that the channel spectrum sharply distinguishes chaotic, ergodic, many-body localized, and scarred dynamical regimes. Finally, we connect the leading channel eigenvalues to experimentally accessible probes based on quantum mutual information, establishing a link between the spectral organization of reset-driven quantum channels and observable relaxation dynamics.
Cite
@article{arxiv.2605.11751,
title = {Chaos Emerge with Exceptional Points in Reset-Driven Floquet Dynamics},
author = {Jia-jin Feng and Quntao Zhuang},
journal= {arXiv preprint arXiv:2605.11751},
year = {2026}
}