Loop Vertex Expansion for Phi^2k Theory in Zero Dimension

Vincent Rivasseau, Zhituo Wang

Published 2010-03-04Version 1

In this paper we extend the method of loop vertex expansion to interactions with degree higher than 4. As an example we provide through this expansion an explicit proof that the free energy of Phi^2k scalar theory in zero dimension is Borel-Le Roy summable of order k-1. We detail the computations in the case of a Phi^6 interaction.