# Multipartite entanglement distribution in a topological photonic network

**Authors:** Juan Zurita, Andrés Agustí Casado, Charles E. Creffield, Gloria Platero  
**arXiv:** [2403.15584](https://arxiv.org/abs/2403.15584)  
**Date:** 2024-03-22  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/2403.15584v1/

## Key points

- Various technologies are being developed for scalable quantum computing
- Topological materials are used to process quantum information
- Innovative approach involves creating a lattice of photonic cavities with alternating hoppings
- Modified multidomain SSH chain consists of topological insulators made from chains of dimers with qubits coupled to each boundary
- Enables topological transfer of photons through a one-dimensional structure, allowing entanglement of qubits on demand
- Evaluation shows system can generate bipartite and multipartite entanglement even in the presence of disorder
- Proposed lattice design facilitates efficient and controllable entanglement between qubits
- Research focuses on distributing multipartite entanglement within the topological photonic network

## Summary

In the pursuit of developing a scalable quantum computer, various technologies have been put forth. Some of these technologies leverage topological materials to process quantum information. One innovative approach involves creating a lattice of photonic cavities with alternating hoppings to form a modified multidomain SSH chain. This unique system consists of a sequence of topological insulators made from chains of dimers, with a qubit coupled to each boundary. This modified lattice has shown great promise for quantum information processing as it enables the topological transfer of photons through a one-dimensional structure. This allows for the entanglement of any set of qubits on demand and provides a solid foundation for a scalable quantum platform. Through an evaluation of entanglement measures and witnesses, it has been demonstrated that this system can generate both bipartite and multipartite entanglement, even in the presence of disorder. The proposed lattice design offers potential advancements in quantum computing by facilitating efficient and controllable entanglement between qubits. Recent research has also focused on distributing multipartite entanglement within this topological photonic network, further highlighting its potential for enhancing quantum information processing capabilities. These developments underscore the significance of utilizing topological materials and photonics in advancing towards practical solutions for quantum computing.