paper

Random Tensor Models

arXiv:1512.06718 · doi:10.1007/s11005-016-0879-x

Abstract

We define in this paper a class of three indices tensor models, endowed with invariance ( being the size of the tensor). This allows to generate, via the usual QFT perturbative expansion, a class of Feynman tensor graphs which is strictly larger than the class of Feynman graphs of both the multi-orientable model (and hence of the colored model) and the invariant models. We first exhibit the existence of a large expansion for such a model with general interactions. We then focus on the quartic model and we identify the leading and next-to-leading order (NLO) graphs of the large expansion. Finally, we prove the existence of a critical regime and we compute the critical exponents, both at leading order and at NLO. This is achieved through the use of various analytic combinatorics techniques.

23 pages, 14 figures

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