3 papers
hep-th2019
Log-Expansions from Combinatorial Dyson-Schwinger Equations
Olaf Krüger
We give a precise connection between combinatorial Dyson-Schwinger equations and log-expansions for Green's functions in quantum field theory. The latter are triangular power serie…
hep-th2019
Vertex-Constraints in 3D Higher Spin Theories
Stefan Fredenhagen, Olaf Krüger, Karapet Mkrtchyan
We analyse the constraints imposed by gauge invariance on higher-order interactions between massless bosonic fields in three-dimensional higher-spin gravities. We show that vertice…
hep-th2018
Constraints for Three-Dimensional Higher-Spin Interactions and Conformal Correlators
Stefan Fredenhagen, Olaf Krüger, Karapet Mkrtchyan
In the context of higher-spin holography, we compare the classification of cubic interaction vertices for higher-spin gravity theories in three dimensions to the possible three-poi…