Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
Journal of Mathematical Physics
34 (1993), S. 5509-5532
ISSN:
1089-7658
Source:
AIP Digital Archive
Topics:
Mathematics
,
Physics
Notes:
Techniques of Erickson and Yennie [Ann. Phys. N.Y. 35, 271 (1965)] are applied in an investigation of a simple Taylor's series which involves products of commutators and nested commutators and which represents the self-energy operator Σ of an electron in an external potential. A technique of "moving the parameter integrals to the mass'' leads to a relatively simple representation of all terms as a one-dimensional integral over a common virtual electron mass squared parameter. Although not a true expansion in powers of the external field, the method provides a window on the higher-order terms in the self-energy operator. Mass eigenfunction expansion concepts are shown to be quite useful in a discussion of infrared divergences.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.530319
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