Perturbative methods for assisted nonperturbative pair production

In the dynamically assisted Schwinger mechanism, the pair production probability is significantly enhanced by including a weak, rapidly varying field in addition to a strong, slowly varying field. In a previous paper we showed that several features of dynamical assistance can be understood by a pert...

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Bibliographic Details
Published inarXiv.org
Main Author Torgrimsson, Greger
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.05.2019
Subjects
Mathematical analysis
Pair production
Physics - High Energy Physics - Phenomenology
Physics - High Energy Physics - Theory
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Summary:In the dynamically assisted Schwinger mechanism, the pair production probability is significantly enhanced by including a weak, rapidly varying field in addition to a strong, slowly varying field. In a previous paper we showed that several features of dynamical assistance can be understood by a perturbative treatment of the weak field. Here we show how to calculate the prefactors of the higher-orders terms, which is important because the dominant contribution can come from higher orders. We give a new and independent derivation of the momentum spectrum using the worldline formalism, and extend our WKB approach to calculate the amplitude to higher orders. We show that these methods are also applicable to doubly assisted pair production.
ISSN:2331-8422
DOI:10.48550/arxiv.1812.04607