Work

Entanglement halos

Year: 2025

Type: article

Abstract: We introduce the concept of , a set of strongly entangled distant sites within the ground state of a quantum many-body system. Such halos emerge in starlike 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 nontrivial 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.

Source: Physical Review Research

DOI: 10.1103/fddq-8lzl

Authors: Nadir Samos Sáenz de Buruaga, Silvia N. Santalla, Germán Sierra, Javier Rodríguez-Laguna