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SUMMARY:Geometry\, Gauge Redundancy\, and Quantum Effective Actions
DTSTART:20261015T120000Z
DTEND:20261015T130000Z
DTSTAMP:20261011T075500Z
UID:indico-event-16922@indico.math.cnrs.fr
DESCRIPTION:Speakers: Viola Gattus (Technische Universität München\, All
 emagne)\n\nThis talk will begin with the basic geometric formulation of ga
 uge theories\, introducing field space\, gauge orbits\, and orbit-adapted 
 coordinates that distinguish physical degrees of freedom from gauge direct
 ions.\nBuilding on this framework\, we will examine the Vilkovisky–DeWit
 t construction of the gauge-invariant effective action\, with particular e
 mphasis on the connection between gauge-fixing independence and reparametr
 isation invariance in field space. The discussion will then turn to applic
 ations in Yang–Mills theory and quantum gravity. Finally\, the talk will
  explore aspects of the Zassenhaus formula and its potential as an alterna
 tive computational approach to methods based on heat-kernel coefficients.\
 nThe talk is intended as an accessible introduction to the geometry underl
 ying gauge-independent effective actions\, complemented by selected applic
 ations and computational techniques.\n\nhttps://indico.math.cnrs.fr/event/
 16922/
LOCATION:Salle 1180\, bâtiment E2 (Salle des séminaires )
URL:https://indico.math.cnrs.fr/event/16922/
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