F. Ehlotzky, KROLL-WATSON-TYPE THEOREM FOR POTENTIAL SCATTERING IN A BICHROMATIC LASER FIELD, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 16(5), 1994, pp. 453-462
We show that for potential scattering of electrons in a bichromatic la
ser field a Kroll-Watson type of theorem can be derived in which the s
cattering T-matrix element is composed of a renormalized on-shell matr
ix element for scattering without a field times a generalized Bessel f
unction factor. The radiation field has two components of frequency om
ega1 and somega1 (s = 2, 3, ...) and both components are out of phase
by an angle phi. Our paper is a generalization of earlier investigatio
ns which were performed in the first-order Born approximation.