| Issue |
EPJ Web Conf.
Volume 335, 2025
EOS Annual Meeting (EOSAM 2025)
|
|
|---|---|---|
| Article Number | 06005 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting - Nonlinear and Quantum Optics | |
| DOI | https://doi.org/10.1051/epjconf/202533506005 | |
| Published online | 22 September 2025 | |
https://doi.org/10.1051/epjconf/202533506005
High-dimensional entanglement and topological protection in nonlinear waveguide arrays
1 Université Paris Cité, CNRS, MPQ, Paris, France
2 Université Paris-Saclay, CNRS, C2N, Palaiseau, France
3 Université Côte d’Azur, CNRS, InPhyNi, Nice, France
* Corresp. author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 22 September 2025
Abstract
We demonstrate a nonlinear AlGaAs photonic chip generating biphotons with high-dimensional spatial correlations. Photon pairs are generated by parametric down conversion in a waveguide array and simultaneously spread through quantum walks along the various waveguides, allowing to generate various types of high-dimensional entangled states of light. We further implement the Su-Schriefer-Heeger model and demonstrate the topological protection of the SPDC process against disorder. These results highlight nonlinear waveguide arrays as a promising platform for exploring the interplay between nonlinearity, disorder and topology in quantum photonic circuits.
© The Authors, published by EDP Sciences, 2025
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