248 citations · 2.7k across the 131 of their papers we have counts for
7 papers · 2 filters
Extremal Black Holes, Stueckelberg Scalars and Phase Transitions
Alessio Marrani, Olivera Miskovic, Paula Quezada Leon
We calculate the entropy of a static extremal black hole in 4D gravity, non-linearly coupled to a massive Stueckelberg scalar. We find that the scalar field does not allow the blac…
A Kind of Magic
L. Borsten, A. Marrani
We introduce the extended Freudenthal-Rosenfeld-Tits magic square based on six algebras: the reals , complexes , ternions , quaternions $\mathbb…
Are all supergravity theories Yang-Mills squared?
A. Anastasiou, L. Borsten, M. J. Duff +3
Using simple symmetry arguments we classify the ungauged , supergravity theories, coupled to both vector and hyper multiplets through homogeneous scalar manifo…
Quantum Klein Space and Superspace
Rita Fioresi, Emanuele Latini, Alessio Marrani
We give an algebraic quantization, in the sense of quantum groups, of the complex Minkowski space, and we examine the real forms corresponding to the signatures , , $…
Supersymmetric Black Holes and Freudenthal Duality
Taniya Mandal, Alessio Marrani, Prasanta K. Tripathy
We study the effect of Freudenthal duality on supersymmetric extremal black hole attractors in N = 2, D = 4 ungauged supergravity. Freudenthal duality acts on the dyonic black hole…
Nonlinear symmetries of black hole entropy in gauged supergravity
Dietmar Klemm, Alessio Marrani, Nicolò Petri +1
Freudenthal duality in N=2, D=4 ungauged supergravity is generated by an anti-involutive operator that acts on the electromagnetic fluxes, and results to be a symmetry of the Beken…
Non-Supersymmetric Magic Theories and Ehlers Truncations
Alessio Marrani, Gianfranco Pradisi, Fabio Riccioni +1
We consider the non-supersymmetric "magic" theories based on the split quaternion and the split complex division algebras. We show that these theories arise as "Ehlers" $SL(2,\math…