Enhancement of charge correlations and real-space topological marker on an interacting non-Hermitian Su-Schrieffer-Heeger model
How broken symmetry makes electrons clump together more strongly
In a simplified model of interacting electrons with unusual physical properties, researchers found that breaking symmetry rules (a non-Hermitian feature) dramatically amplifies the tendency for electrons to bunch up in ordered patterns. This effect is strongest at special points in the system where the usual rules of quantum mechanics start to fail, and a reliable diagnostic tool called the topological marker successfully tracks when and where this bunching occurs.
Understanding how electrons organize themselves in systems with broken symmetry could guide the design of materials with new electronic or optical properties. The work shows that non-Hermitian features—which were once thought to be mere mathematical curiosities—can actually be engineered to strengthen desired electron behaviors, opening a practical path for manipulating matter at the quantum level.