45 citations · 249 across the 18 of their papers we have counts for
8 papers · 1 filter
Relativistic kinetic gases as direct sources of gravity
Manuel Hohmann, Christian Pfeifer, Nicoleta Voicu
We propose a new model for the description of a gravitating multi particle system, viewed as a kinetic gas. The properties of the, colliding or non-colliding, particles are encoded…
Photon sphere and perihelion shift in weak gravity
Sebastian Bahamonde, Kai Flathmann, Christian Pfeifer
Among modified theories of gravity, the teleparallel gravity is an intensively discussed modelin the literature. The best way to investigate its viabilityis to derive observ…
Flat connection for rotating vacuum spacetimes in extended teleparallel gravity theories
Laur Järv, Manuel Hohmann, Martin Krššák +1
Teleparallel geometry utilizes Weitzenböck connection which has nontrivial torsion but no curvature and does not directly follow from the metric like Levi-Civita connection. In ext…
On the gauge fixing in the Hamiltonian analysis of general teleparallel theories
Daniel Blixt, Manuel Hohmann, Christian Pfeifer
The covariant formulation of teleparallel gravity theories must include the spin connection, which has 6 degrees of freedom. One can, however, always choose a gauge such that the s…
Observers' measurements of time and length in premetric electrodynamics
Christian Pfeifer
The notion of observers' and their measurements is closely tied to the Lorentzian metric geometry of spacetime, which in turn has its roots in the symmetries of Maxwell's theory of…
Observables from modified dispersion relations on curved spacetimes:circular orbits, redshift and lateshift
Christian Pfeifer
The Hamiltonian formulation of modified dispersion relations (MDRs) allows for their implementation on generic curved spacetimes. In turn it is possible to derive phenomenological…