ATOMIC STATES IN THE RELATIVISTIC HIGH-FREQUENCY APPROXIMATION OF KRISTIC-MITTLEMAN

The three-dimensional atomic potentials in the presence of a superinte nse laser field have been discussed within the relativistic high-frequ ency approximation of Kristic and Mittleman. Using a one-dimensional m odel, similar to that employed by Kylstra, Ermolaev and Joachain in ab initio calculations on the time-dependent Dime equation, the electron mass shift due to dressing by a superstrong laser field is investigat ed. In the full domain of the laser parameters, frequency omega and th e peak field strength epsilon(0), the one-dimensional bound states exh ibit remarkable features. The numerical calculations show the existenc e of a very wide intermediate range of field strengths when, in the ze roth-order of the high-frequency approximation, the binding is stabili zed by the field.