Entanglement Halos
Strongly Correlated Electrons
2026-02-03 v1 Quantum Physics
Abstract
We introduce the concept of entanglement halos, a set of strongly entangled distant sites within the ground state of a quantum many-body system. Such halos emerge in star-like systems with exponentially decaying couplings, as we show using both free-fermions and the spin-1/2 antiferromagnetic Heisenberg model. Depending on the central connectivity, entanglement halos may exhibit trivial and non trivial symmetry-protected topological features. Our findings highlight how geometry and connectivity can generate complex entanglement structures with rich physical content, which can be experimentally accessible via state-of-the-art technologies.
Cite
@article{arxiv.2507.20430,
title = {Entanglement Halos},
author = {Nadir Samos Sáenz de Buruaga and Silvia N. Santalla and Germán Sierra and Javier Rodríguez-Laguna},
journal= {arXiv preprint arXiv:2507.20430},
year = {2026}
}
Comments
5 pages + 9 pages of SM. 5 figures main text