A treatise on the interaction of molecular systems with short-pulsed highly-intense external fields

摘要: a b s t r c In this review, we consider two gauges: one, the field-free gauge, is formed by electronic eigenstates and other, field-dressed basis set. The gauge used, of course, in case time-independent systems but then it also more common one to be used molecular exposed external fields. This conceptually simple therefore numerically friendly — features which make versatile for numerical application. fielddressed is, eventually, involved yields deeper insight might lead better understanding complicated interaction between system addition, these can exploited develop efficient reliable approximations that may save CPU (computer processing unit) time applications. These gauges are main topics present review. Once general derivation completed, additional issues discussed: (i) extend include fields non-classical photon-state distributions (also known as non-coherent Fock-state distributions). photon state distributions, recently considered first [A.K. Paul, S. Adhikari, M. Baer, R. Phys. Rev. A 81 (2010) 013412], interesting on their own footing. Although here they mainly serve vehicle test above-mentioned novel approximations, devote part review studying importance noncoherent Fock states obtaining an unbiased correct with strong, short-pulsed laser For purpose, study photo-dissociation process H + show (a) introduced, diminish about order magnitude minimal loss accuracy (b) indeed found affect unique way. (ii) As mentioned, contributes effects due analyze interplay non-adiabatic coupling terms interactions. analysis relates directly open question whether capable eliminating (or creating) conical intersections.