A gauge-covariant derivation of the strong-field approximation |
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| Authors: | W. Becker D. B. Milo?evi? |
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| Affiliation: | (1) Max-Born-Institut, Max-Born-Strasse 2a, Berlin, 12489, Germany;(2) Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina |
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| Abstract: | ![]()
A brief discussion of gauge invariance in nonrelativistic quantum mechanics is presented. The strong-field approximation for ionization of an atom by a laser field is rederived in such a way that the resulting ionization amplitude comes out identical in any gauge. This result agrees with the usual length-gauge form. |
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