# Constructing Qubit Edge States by Inverse-Designing the Electromagnetic Environment

## TL;DR

Researchers use inverse design to create a structure that stabilizes topological edge states in a chain of qubits, enabling robust quantum interactions.

## Contribution

The paper introduces an inverse-design method to engineer electromagnetic environments for topological qubit edge states.

## Key findings

- Edge states remain robust and isolated from the bulk despite long-range coupling and disorder.
- Topological properties are preserved even with deviations from complete chiral symmetry.
- Inverse design enables precise control over photon-mediated interactions in qubit chains.

## Abstract

Building on advances in topological photonics and computational
optimization, we inverse-design a periodic dielectric structure surrounding
a chain of interacting qubits, emulating an extended, dimerized Su–Schrieffer–Heeger
excitonic model. Our approach enables precise control over photon-mediated
interactions, allowing us to explore the emergence of topological
edge states in the qubit chain. By systematically tuning structural
parameters to address both coherent evolution and dissipative effects,
we demonstrate that edge states remain robust and isolated from the
bulk, even in the presence of long-range coupling and disorder, and
preserve key topological properties despite deviations from complete
chiral symmetry preservation. This work highlights the potential of
inverse design in stabilizing topological excitonic states, opening
new possibilities for advanced quantum technologies.