Nonclassicality in Raman scattering: Quantum entanglement, squeezing of vacuum fluctuations, sub-shot noise and joint photon-phonon number and integrated-intensity distributions

Nonclassical properties of the modes in the stimulated, spontaneous and partially spontaneous Raman processes are studied using a completely quantum description of Raman process. Both coherent scattering and chaotic scattering are studied. Nonclassicality in Raman process is observed by means of intermodal entanglement, single mode and intermodal squeezing of vacuum fluctuations, sub-shot noise and wave variances. Joint photon-phonon number and integrated-intensity distributions are then used to illustrate the observed nonclassicalities. Conditional and difference number distributions are provided to illustrate the nonclassical character. The mutual relation between the obtained nonclassicalities and their variations with various parameters are also reported.