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Relativistic many-body and QED calculations on atomic systems

โœ Scribed by Ingvar Lindgren

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
1003 KB
Volume
57
Category
Article
ISSN
0020-7608

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โœฆ Synopsis

A review is given of many-body perturbation methods, particularly in the all-order and coupled-cluster forms. Relativistic many-body schemes are analyzed in terms of one-and two-photon potentials, derived by means of QED. A complete second-order (nonradiative) calculation for He-like ions is presented, including repeated Breit interactions as well as the effects of retardation and of negative-energy states, but omitting the Lamb shift. Numerical results of some Lamb-shift calculations are also given. From the analysis, conclusions can be drawn concerning the accuracy of certain relativistic many-body approaches. @

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