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X-WR-CALNAME:Centre for Mathematical Sciences
X-ORIGINAL-URL:https://math-sciences.org
X-WR-CALDESC:Events for Centre for Mathematical Sciences
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TZID:UTC
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TZOFFSETFROM:+0000
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DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20211020T160000
DTEND;TZID=UTC:20211020T170000
DTSTAMP:20230605T005534
CREATED:20210805T171048Z
LAST-MODIFIED:20211013T114814Z
UID:4078-1634745600-1634749200@math-sciences.org
SUMMARY:Gerald V. Dunne (Connecticut)
DESCRIPTION:Resurgence and Extreme Field QFT \nI propose a new approach to multi-loop QFT computations in strong background fields\, based on an application of resurgent asymptotics to the extraction of strong-field and non-perturbative information from a limited number of terms of a weak-field expansion. The proposed method is demonstrated explicitly with the one-loop and two-loop expressions for the QED Euler-Heisenberg effective action\, for which a surprising amount of strong-field and non-perturbative physics may be derived from just 10 terms of a weak magnetic field expansion. I will also discuss applications to inhomogeneous fields.
URL:https://math-sciences.org/event/gerald-v-dunne-connecticut/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
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