52 citations · 171 across the 15 of their papers we have counts for
15 papers
Einstein-Kropina Metrics and Their Application in Finsler Gravity
Sjors Heefer, Fidel F. Villaseñor, Andrea Fuster
We generalize the Einstein condition for Kropina metrics obtained in the positive definite setting by Zhang, Shen and others to all signatures. As examples of Einstein-Kropina metr…
Higher-curvature corrections and the endpoint of black hole evaporation in gravitational effective field theory
Lorens F. Niehof, Sjors Heefer, Andrea Fuster +1
The endpoint of black hole evaporation remains uncertain once the semiclassical description approaches the Planck scale. In this work we study late-stage evaporation within four-di…
Cosmological Landsberg Finsler spacetimes
Annamária Friedl-Szász, Elena Popovici-Popescu, Nicoleta Voicu +2
We locally classify all possible cosmological homogeneous and isotropic Landsberg-type Finsler structures, in 4-dimensions. Among them, we identify viable non-stationary Finsler sp…
Berwald -Kropina Spaces of Arbitrary Signature: Metrizability and Ricci-Flatness
Sjors Heefer
The (pseudo-)Riemann-metrizability and Ricci-flatness of Finsler spaces with -Kropina metric of Berwald type are investigated. We prove that the affine conne…
New class of non-Einstein pp-wave solutions to quadratic gravity
Sjors Heefer, Lorens F. Niehof, Andrea Fuster
We obtain a new family of exact vacuum solutions to quadratic gravity that describe pp-waves with two-dimensional wave surfaces that can have any prescribed constant curvature. Whe…
Finsler Geometry, Spacetime & Gravity -- From Metrizability of Berwald Spaces to Exact Vacuum Solutions in Finsler Gravity
Sjors Heefer
This PhD dissertation covers a range of topics in Finsler geometry and Finsler gravity, most notably: (i) the characterization of Berwald spaces, (ii) pseudo-Riemann (non-)metrizab…
White Paper and Roadmap for Quantum Gravity Phenomenology in the Multi-Messenger Era
R. Alves Batista, G. Amelino-Camelia, D. Boncioli +101
The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions of various possible theories of quantum gravity been put…
A Cosmological Unicorn Solution to Finsler Gravity
Sjors Heefer, Christian Pfeifer, Antonio Reggio +1
We present a new family of exact vacuum solutions to Pfeifer and Wohlfarth's field equation in Finsler gravity, consisting of Finsler metrics that are Landsbergian but not Berwaldi…
Finsler gravitational waves of -type and their observational signature
Sjors Heefer, Andrea Fuster
We introduce a new class of -type exact solutions in Finsler gravity closely related to the well-known pp-waves in general relativity. Our class contains most of the exact s…
On the metrizability of -Kropina spaces with closed null 1-form
Sjors Heefer, Christian Pfeifer, Jorn van Voorthuizen +1
We investigate the local metrizability of Finsler spaces with -Kropina metric , where is a closed null 1-form. We show that such a space is of Berwald typ…
Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
A. Addazi, J. Alvarez-Muniz, R. Alves Batista +157
The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experim…
Randers pp-waves
Sjors Heefer, Christian Pfeifer, Andrea Fuster
In this work we study Randers spacetimes of Berwald type and analyze Pfeifer and Wohlfarth's vacuum field equation of Finsler gravity for this class. We show that in this case the…
On the non metrizability of Berwald Finsler spacetimes
Andrea Fuster, Sjors Heefer, Christian Pfeifer +1
We investigate whether Szabo's metrizability theorem can be extended to Finsler spaces of indefinite signature. For smooth, positive definite Finsler metrics, this important theore…
Identifying Berwald Finsler Geometries
Christian Pfeifer, Sjors Heefer, Andrea Fuster
Berwald geometries are Finsler geometries close to (pseudo)-Riemannian geometries. We establish a simple first order partial differential equation as necessary and sufficient condi…
Relativistic compatibility of the interacting -Poincaré model and implications for the relative locality framework
Giulia Gubitosi, Sjors Heefer
We investigate the relativistic properties under boost transformations of the -Poincaré model with multiple causally connected interactions, both at the level of its formulation…