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Gradient Properties of RG Flows

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If you have a question about this talk, please contact Jackson Fliss .

General properties of the renormalisation group (RG) are of immense theoretical interest, as they have implications for the evolution of physical systems from high to low energies. In a perturbative setting, RG flows are determined by a vector field, the beta function, that can be computed in a loop expansion. In this talk we will discuss the gradient property of the RG up to six loops in multi-scalar models in d=4 and d=4-Îĩ dimensions. After elucidating a variety of subtleties, we will derive and discuss highly nontrivial constraints that need to be satisfied for the RG flow to be gradient.

This talk is part of the Quantum Fields and Strings Seminars series.

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