Non-perturbative aspects of galileon dualityTools Millington, Peter, Niedermann, Florian and Padilla, Antonio (2018) Non-perturbative aspects of galileon duality. European Physical Journal C, 78 (7). p. 546. ISSN 1434-6044 Full text not available from this repository.AbstractWe study quantum aspects of the galileon duality, especially in the case of a particular interacting galileon theory that is said to be dual to a free theory through the action of a simultaneous field and coordinate transformation. This would appear to map a theory with multiple vacua to one with a unique vacuum state. However, by regulating the duality transformation using external sources, we are able to preserve the full vacuum structure in the dual frame. By explicitly calculating the one-particle irreducible effective action on a maximally symmetric background, we identify a semi-classical contribution to the Wightman functions that has not been taken into account in previous analyses due to the singular point in the duality map. This may affect its spectral properties at high energy scales. These observations cast doubt on the main evidence in support of a non-local UV structure for galileons.
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