Ideal pairing of the Stokes and anti-Stokes photons in the Raman process
arXiv:2102.09450 · doi:10.1103/PhysRevA.103.033708
Abstract
A quantum model of the Raman process with the independent Stokes and anti-Stokes nonlinear interactions is developed to study nonclassical correlations between the photons in the Stokes and anti-Stokes fields. The role of the laser pump amplitude, the ratio of the Stokes and anti-Stokes coupling constants and the population and losses of the vibrational mode in forming the correlations is elucidated. The intensity cross-correlation function, noise-reduction-factor, two-mode principal squeezing variance, logarithmic negativity, non-classicality depth, steering parameter and the Bell parameter are analyzed side-by-side to shed light to the correlations between the Stokes and anti-Stokes fields. Conditions for having the Stokes and anti-Stokes fields composed of only photon pairs, similarly as it occurs in twin beams in parametric down-conversion, are revealed. They allow for nonzero mean thermal phonon numbers.
arXiv commentConditions for having the Stokes and anti-Stokes fields composed of only photon pairs in the Raman process analogous to twin beams in parametric down-conversion are obtained. 9 figures and 17 pages
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