Preparing States of Single-Photon Superposition in the Basis of Laguerre–Gauss Modes with Spontaneous Parametric Scattering
Abstract The possibility of conditionally preparing single-photon states with nonzero orbital angular momentum (OAM) during spontaneous parametric scattering by controlling the OAM of pump radiation is considered. Superpositional single-photon two-dimensional and three-dimensional states corresponding to qubits and qutrits in the basis of Laguerre–Gauss beams with different values of the OAM are obtained.