期刊
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
卷 109, 期 2, 页码 207-212出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063776109080044
关键词
-
资金
- US Department of Energy [DEFC52-08NA28616]
Dirac's analysis of radiation reaction force in classical electrodynamics suggested that a 4-momentum not collinear with 4-velocity could be introduced for a radiating electron. This would be equivalent to renormalization of the electron mass as an operator relating these 4-vectors. Dirac also pointed to an arbitrary choice made in deriving the Lorentz-Abraham-Dirac (LAD) equation. It was shown that renormalization substantially modifies the LAD equation under the additional requirement that the standard relativistic relation E-2 = p(2)c(2) + m(2)c(4) holds for the renormalized energy and momentum. The renormalized LAD equation is more rigorous than the LAD equation, because the drawbacks of the latter are eliminated, and is simpler than a well-known approximation of the LAD equation. The renormalized LAD equation appears to be better suited for numerical simulations of processes in ultrahigh-intensity laser-pulse fields.
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