7 papers
Reduction of the Finsler gravity vacuum equation and dynamics for the cosmological Landsberg spacetimes
Christian Pfeifer, Fidel F. Villaseñor
When solving the Einstein vacuum equations, a very helpful feature is that they reduce simply to the vanishing of the Ricci tensor. In Finsler gravity, a promising extension of gen…
Spherically symmetric, asymptotically flat Berwald vacuum solutions in Finsler gravity
Nicoleta Voicu, Diana - Maria Birla, Christian Pfeifer
So-called Berwald-Finsler spacetimes are Finsler spacetimes that are closest to pseudo-Riemannian geometry, as their canonical nonlinear connection defines an affine connection on…
On the Finsler variational nature of autoparallels in metric-affine geometry
Lehel Csillag, Nicoleta Voicu, Salah Elgendi +1
In metric-affine geometry, autoparallels are generically non-variational, i.e., they are not the extremals of any action integral. The existence of a parametrization-invariant acti…
Light deflection in axially symmetric stationary spacetimes filled with a moving medium
Christian Pfeifer, Barbora BezdÄková, Oleg Yu. Tsupko
The deflection of light rays near gravitating objects can be influenced not only by gravity itself but also by the surrounding medium. Analytical studies of such effects are possib…
From kinetic gases to an exponentially expanding universe - The Finsler-Friedmann equation
Christian Pfeifer, Nicoleta Voicu, Annamaria Friedl-Szász +1
We investigate the gravitational field of a kinetic gas beyond its usual derivation from the second moment of the one-particle distribution function (1PDF), that serves as energy-m…
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…