Nonclassical light in a three-waveguide coupler with second-order nonlinearity Mohd Syafiq M. Hanapi, Abdel-Baset M. A. Ibrahim, Rafael Julius, Pankaj K. Choudhury and Hichem Eleuch EPJ Quantum Technol., 11 1 (2024) 51 Published online: 14 August 2024 DOI: 10.1140/epjqt/s40507-024-00263-9