Transient localization from the interaction with quantum bosons
Abstract
We carefully revisit the electron-boson scattering problem, going beyond popular semi-classical treatments. By providing numerically exact results valid at finite temperatures, we demonstrate the existence of a regime of electron-boson scattering where quantum localization processes become relevant despite the absence of extrinsic disorder. Localization in the Anderson sense is caused by the emergent randomness resulting from a large thermal boson population, being effective at transient times before diffusion can set in. Compelling evidence of this transient localization phenomenon is provided by the observation of a distinctive displaced Drude peak (DDP) in the optical absorption and the ensuing suppression of conductivity. Our findings identify a general route for anomalous metallic behavior that can broadly apply in interacting quantum matter.
Cite
@article{arxiv.2312.03840,
title = {Transient localization from the interaction with quantum bosons},
author = {H. Rammal and A. Ralko and S. Ciuchi and S. Fratini},
journal= {arXiv preprint arXiv:2312.03840},
year = {2025}
}