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Colored tensor models – a review. (English) Zbl 1242.05094
Summary: Colored tensor models have recently burst onto the scene as a promising conceptual and computational tool in the investigation of problems of random geometry in dimension three and higher. We present a snapshot of the cutting edge in this rapidly expanding research field. Colored tensor models have been shown to share many of the properties of their direct ancestor, matrix models, which encode a theory of fluctuating two-dimensional surfaces. These features include the possession of Feynman graphs encoding topological spaces, a \(1/N\) expansion of graph amplitudes, embedded matrix models inside the tensor structure, a resumable leading order with critical behavior and a continuum large volume limit, Schwinger-Dyson equations satisfying a Lie algebra (akin to the Virasoro algebra in two dimensions), non-trivial classical solutions and so on. In this review, we give a detailed introduction of colored tensor models and pointers to current and future research directions.

MSC:
05C15 Coloring of graphs and hypergraphs
05C75 Structural characterization of families of graphs
81Q30 Feynman integrals and graphs; applications of algebraic topology and algebraic geometry
81T17 Renormalization group methods applied to problems in quantum field theory
81T18 Feynman diagrams
83C27 Lattice gravity, Regge calculus and other discrete methods in general relativity and gravitational theory
83C45 Quantization of the gravitational field
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