Geometry, Gauge Redundancy, and Quantum Effective Actions

Organisé par

Institut Henri Poincaré

This talk will begin with the basic geometric formulation of gauge theories, introducing field space, gauge orbits, and orbit-adapted coordinates that distinguish physical degrees of freedom from gauge directions. Building on this framework, we will examine the Vilkovisky–DeWitt construction of the gauge-invariant effective action, with particular emphasis on the connection between gauge-fixing in

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