👉 Rough-light particles are a type of light particle, often associated with the study of low-energy, non-linear optical processes and quantum optics. Unlike coherent light, which consists of waves that maintain a fixed phase relationship, rough-light particles exhibit a broader distribution of frequencies and phases. This makes them appear "rough" in their spectral properties. They are typically generated through interactions like spontaneous parametric down-conversion or four-wave mixing, where a high-energy pump photon splits into two lower-energy photons, often with a significant amount of energy spread across a wide range of wavelengths. These particles are crucial in understanding and manipulating light at the quantum level, particularly in applications involving quantum information processing, entanglement generation, and the study of nonlinear optical phenomena.
