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Physics Theory

Patrick Collison1
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Gauge Dependence in Effective Potentials and the Vilkovisky-DeWitt Formalism

Discussions surrounding the ambiguities of effective actions and potentials are reinforced by highlighting the necessity of an additional condition on the gauge-fixing function: its vacuum expectation value must vanish in the absence of external sources. The Vilkovisky-DeWitt approach is advocated a…