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arXiv · 1702.07602

Loop Vertex Expansion for Higher Order Interactions

Vincent Rivasseau
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Abstract

This note provides an extension of the constructive loop vertex expansion to stable interactions of arbitrarily high order, opening the way to many applications. We treat in detail the example of the $(\bar ϕϕ)^p$ field theory in zero dimension. We find that the important feature to extend the loop vertex expansion is not to use an intermediate field representation, but rather to force integration of exactly one particular field per vertex of the initial action.

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Vincent Rivasseau. 2017-11-04. Loop Vertex Expansion for Higher Order Interactions. https://doi.org/10.1007/s11005-017-1037-9

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