Nonequilibrium magnetic dynamics of the two-component Bose-Hubbard model
Abstract
A central challenge in strongly interacting many-body systems is understanding the far-from-equilibrium dynamics. Here, we study the many-body magnetic dynamics of the two-component Bose-Hubbard model by developing a two-component extension of nonequilibrium bosonic dynamical mean-field theory. Using this numerical method, we uncover rich quantum spin dynamics via inter-species interaction quenches. A sudden ramp-up of interactions induces slow thermalization, leading to a long-lived metastable state, whereas quenching to weak interactions results in rapid thermal equilibrium, featuring a two-step relaxation behavior through distinct exponential decays. Furthermore, under periodic modulation of the inter-species interactions, emergent Floquet dynamics drives a transition from a magnetic to an unordered phase.
Keywords
Cite
@article{arxiv.2507.09593,
title = {Nonequilibrium magnetic dynamics of the two-component Bose-Hubbard model},
author = {Hui Tan and Jianmin Yuan and Yongqiang Li},
journal= {arXiv preprint arXiv:2507.09593},
year = {2025}
}