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Constraining the effective action by a method of external sources (2016)
Journal Article
Garbrecht, B., & Millington, P. (2016). Constraining the effective action by a method of external sources. Nuclear Physics B, 906, https://doi.org/10.1016/j.nuclphysb.2016.02.022

We propose a novel method of evaluating the effective action, wherein the physical one- and two-point functions are obtained in the limit of non-vanishing external sources. We illustrate the self-consistency of this method by recovering the usual 2PI... Read More about Constraining the effective action by a method of external sources.

Self-consistent solitons for vacuum decay in radiatively generated potentials (2015)
Journal Article
Garbrecht, B., & Millington, P. (2015). Self-consistent solitons for vacuum decay in radiatively generated potentials. Physical Review D, 92(12), https://doi.org/10.1103/PhysRevD.92.125022

We use a Green’s function approach in order to develop a method for calculating the tunneling rate between radiatively generated nondegenerate vacua. We apply this to a model that exhibits spontaneous symmetry breaking via the Coleman-Weinberg mechan... Read More about Self-consistent solitons for vacuum decay in radiatively generated potentials.