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Abstract
The calculations of frequency-dependent second hyperpolarizabilities for the (static) electric field induced second harmonic generation (ESHG) [γ(−2ω;ω,ω,0)] of the FH, H2O, CO, and NH3 molecules in the second-order Mo/ller–Plesset perturbation theory (MP2) based on the quasienergy derivative (QED) method are performed by numerical differentiation of frequency-dependent first hyperpolarizabilities for the second harmonic generation (SHG) [β(−2ω;ω,ω)] with respect to static electric fields. The QED-MP2 values of the ESHG second hyperpolarizabilities γ∥(−2ω;ω,ω,0) of the H2O, CO, and NH3 molecules show good agreement with the experimental values.
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