caa a22 4500 469099399 CHVBK 20180323133040.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF00402675 doi (NATIONALLICENCE)springer-10.1007/BF00402675 Nonrelativistic calculation of the Lamb shift without applying the dipole approximation [Elektronische Daten] [J. Seke, W. Mödritsch] By applying a method which exploits the O(4) symmetry of the nonrelativistic hydrogen atom, the Lamb shift is calculated without making the dipole approximation. Similar calculations in the dipole approximation have been previously carried out by Lieber. The advantage of our calculations is that, without introducing a cutoff-frequency, analytical and numerical results for energy-level (Lamb) shifts, in which the self-energy of the free electron is completely separated, are obtained. Since the obtained results are finite, the significance of the retardation effects is clearly demonstrated. Furthermore, a comparison is also made with the results obtained by other authors. Kluwer Academic Publishers, 1992 Seke J. Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10/136, A-1040, Vienna, Austria aut Mödritsch W. Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10/136, A-1040, Vienna, Austria aut Letters in Mathematical Physics Kluwer Academic Publishers 24/2(1992-02-01), 115-124 0377-9017 24:2<115 1992 24 11005 https://doi.org/10.1007/BF00402675 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00402675 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Seke J. Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10/136, A-1040, Vienna, Austria aut NATIONALLICENCE 700 1- Mödritsch W. Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10/136, A-1040, Vienna, Austria aut NATIONALLICENCE 773 0- Letters in Mathematical Physics Kluwer Academic Publishers 24/2(1992-02-01), 115-124 0377-9017 24:2<115 1992 24 11005 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer