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Loops and loop clouds - a numerical approach to the worldline formalism in QED - | | Holger Gies
; Kurt Langfeld
; | | Date: |
14 Dec 2001 | | Journal: | Int.J.Mod.Phys. A17 (2002) 966-978 | | Subject: | hep-ph | | Affiliation: | CERN), Kurt Langfeld (Tubingen U. | | Abstract: | A numerical technique for calculating effective actions of electromagnetic backgrounds is proposed, which is based on the string-inspired worldline formalism. As examples, we consider scalar electrodynamics in three and four dimensions to one-loop order. Beyond the constant-magnetic-field case, we analyze a step-function-like magnetic field exhibiting a nonlocal and nonperturbative phenomenon: ``magnetic-field diffusion’’. Finally, generalizations to fermionic loops and systems at finite temperature are discussed. | | Source: | arXiv, hep-ph/0112198 | | Services: | Forum | Review | PDF | Favorites | |
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