Single-particle entanglement dynamics in complex systems
Abstract
We analyze the effect of varying system conditions on the single-particle entanglement entropy for an arbitrary eigenstate of a complex system that can be described by a multiparametric Gaussian ensemble. Our theoretical analysis leads to the identification of a single functional of the system parameters that governs the entropy dynamics. This reveals a sensitivity of the entropy to collective information content, characterized by the functional, instead of the individual system details. The functional can further be used to identify the universality classes as well as a deep web of connection underlying different quantum states.
Cite
@article{arxiv.2503.01989,
title = {Single-particle entanglement dynamics in complex systems},
author = {Devanshu Shekhar and Pragya Shukla},
journal= {arXiv preprint arXiv:2503.01989},
year = {2025}
}
Comments
26 pages, the emphasis in current version is only on single particle entanglement with new details. To keep the paper focussed, the many body entanglement part appeared in previous version is now removed and will be presented as a separate work