Abstract
In this paper, we give an overview of nonclassical effects, such as squeezing and sub-Poissonian states, of an optical field in coherent anti-Stokes Raman scattering and coherent anti-Stokes hyper-Raman scattering under the short time scale. We establish the coupled Heisenberg equations of motion of quadrature operators in terms of real and imaginary parts. We investigate the photon statistics of the pump mode in these processes and find that they are sub-Poissonian in nature. We demonstrate that squeezing and sub-Poissonian photon statistics are greater in coherent anti-Stokes hyper-Raman scattering (CAHRS) than in coherent anti-Stokes Raman scattering (CARS). The effect of the sub- Poissonian nature of an optical field in terms of total noise is also incorporated. We show that the depth of nonclassicality directly depends on the amount of total noise present in the system. This suggests that the more squeezed the state, the greater its total noise in the system.
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Kumar, S., Giri, D.K. Realization of Nonclassical Effects of Light and Total Noise in Coherent Anti-Stokes Raman and Hyper-Raman Scatterings Up to the First-Order Hamiltonian Interaction. J Russ Laser Res 41, 235–245 (2020). https://doi.org/10.1007/s10946-020-09870-0
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DOI: https://doi.org/10.1007/s10946-020-09870-0