Molecular dynamics in intense laser fields. I. One-dimensional systems in infrared radiation

The Bloch–Nordsieck transformation of quantum electrodynamics is applied to the molecular Hamiltonian in order to include explicitly radiative corrections in molecular dynamics. General coupled equations are obtained for all field strengths. In the adiabatic limit, we obtain dressed potential surfaces which undergo radiative distortions relative to the field free potentials. Analytic expressions are obtained for these radiative effects in the presence of intense IR laser fields for harmonic, Morse, and double well potentials. These effects are shown to be important at field intensities greater than 1012 W/cm2 and may be interpreted as generalized field induced Lamb shifts.