However, recent theoretical work from the University of Ottawa demonstrated that disordered, incoherent light can still yield entangled photon pairs. Building on prior experiments that used incoherent light from light-emitting diodes, the researchers applied spontaneous parametric down-conversion to natural sunlight. Spontaneous parametric down-conversion is a non-linear process where individual incoming pump photons split into entangled photon pairs inside a non-linear crystal. Satellite encryption and future extensionsGenerating entangled photons directly from sunlight holds immediate promise for space-based quantum communication networks. Additionally, researchers noted that the solar concentration approach could be adapted to other non-linear optical processes, such as four-wave mixing, creating new pathways for sustainable quantum photonics.