101 citations · 963 across the 43 of their papers we have counts for
43 papers
Cosmological Spacetimes with Sign-Changing Spatial Curvature and Topological Transitions
Gerardo García-Moreno, Bert Janssen, Alejandro Jiménez Cano +3
Observational evidence, together with practical computations and modeling, supports a Euclidean spatial sector in the current cosmological model based on the FLRW metric. This, how…
On the topological character of metric-affine Lovelock Lagrangians in critical dimensions
Bert Janssen, Alejandro Jiménez-Cano
In this paper we prove that the -th order metric-affine Lovelock Lagrangian is not a total derivative in the critical dimension in the presence of non-trivial non-metrici…
A non-trivial connection for the metric-affine Gauss-Bonnet theory in
Bert Janssen, Alejandro Jimenez-Cano, Jose Alberto Orejuela
We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine Lovelock theories. First we study the projective invariance of general Lovelock actions and show that all c…
(Non-)uniqueness of Einstein-Palatini Gravity
Bert Janssen, Alejandro Jimenez-Cano, Jose Alberto Orejuela +1
We analyse the most general connection allowed by Einstein-Hilbert theory in Palatini formalism. We also consider a matter lagrangian independent of the affine connection. We show…
Projective symmetries and induced electromagnetism in metric-affine gravity
Bert Janssen, Alejandro Jimenez-Cano
We present a framework in which the projective symmetry of the Einstein-Hilbert action in metric-affine gravity is used to induce an effective coupling between the Dirac lagrangian…
On the (non-)uniqueness of the Levi-Civita solution in the Einstein-Hilbert-Palatini formalism
Antonio N. Bernal, Bert Janssen, Alejandro Jimenez-Cano +3
We study the most general solution for affine connections that are compatible with the variational principle in the Palatini formalism for the Einstein-Hilbert action (with possibl…