22 citations · 80 across the 7 of their papers we have counts for
7 papers
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…
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…
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…
Non-linear uplift Ansätze for the internal metric and the four-form field-strength of maximal supergravity
Olaf Krüger
The uplift of SO(8) gauged N=8 supergravity to 11-dimensional supergravity is well studied in the literature. It is given by consistent relations between the respective vector and…
Consistent 4-form fluxes for maximal supergravity
Hadi Godazgar, Mahdi Godazgar, Olaf Krueger +1
We derive new ansaetze for the 4-form field strength of D=11 supergravity corresponding to uplifts of four-dimensional maximal gauged supergravity. In particular, the ansaetze dire…
An SO(3)SO(3) invariant solution of supergravity
Hadi Godazgar, Mahdi Godazgar, Olaf Krueger +2
We construct a new SO(3)SO(3) invariant non-supersymmetric solution of the bosonic field equations of supergravity from the corresponding stationary point of maximal…
Exact band structures for 1D superlattices beyond the tight-binding approximation
Olaf Krüger, Alejandro Saenz
The band structures describing non-interacting particles in one-dimensional superlattices of arbitrary periodicity are obtained by an analytical diagonalization of the Hamiltonian…