Vavulin, DNSukhorukov, Andrey2023-03-212023-03-211742-6588http://hdl.handle.net/1885/287259We describe the generation of photon pairs entangled in optical angular momentum (OAM) through spontaneous four-wave mixing (SFWM) in circular arrays of nonlinear waveguides. We show that the incorporation of the array twist along the waveguides can enable robust generation even in presence of defects and inhomogeneities. We present analytical results and numerical simulations based on coupled-mode equations for the classical pump field and a discrete Shrodinger equation for the biphoton wave function.This work was financially supported by the Government of Russian Federation, Grant 074-U01application/pdfen-AU© American Institute of Physicshttps://creativecommons.org/licenses/by/3.0/201710.1088/1742-6596/917/6/0620102022-01-16the Creative Commons Attribution 3.0 licence