39 citations · 133 across the 7 of their papers we have counts for
7 papers
Disformal Maps: Classification and Singular Dynamics
Mohammad Ali Gorji, Pavel Jiroušek, Alexander Vikman +1
Being agnostic about the field content of a gravitational system, we consider a general disformal transformation of the metric, , on a four-dimensional Lo…
New Dynamical Degrees of Freedom from Invertible Transformations
Pavel Jiroušek, Keigo Shimada, Alexander Vikman +1
We show that invertible transformations of dynamical variables can change the number of dynamical degrees of freedom. Moreover, even in cases when the number of dynamical degrees o…
Disforming to Conformal Symmetry
Pavel Jiroušek, Keigo Shimada, Alexander Vikman +1
We analyse the dynamical properties of disformally transformed theories of gravity. We show that disformal transformation typically introduces novel degrees of freedom, equivalent…
Losing the trace to find dynamical Newton or Planck constants
Pavel Jiroušek, Keigo Shimada, Alexander Vikman +1
We show that promoting the trace part of the Einstein equations to a trivial identity results in the Newton constant being an integration constant. Thus, in this formulation the Ne…
Axionic cosmological constant
Katrin Hammer, Pavel Jirousek, Alexander Vikman
We propose a novel, higher-derivative, Weyl-invariant and generally-covariant theory for the cosmological constant. This theory is a mimetic construction with gauge fields playing…
Gravity waves in parity-violating Copernican Universes
Stephon Alexander, Leah Jenks, Pavel Jiroušek +2
In recent work minimal theories allowing the variation of the cosmological constant by means of a balancing torsion, have been proposed. It was found that such theories contain par…
New Weyl-invariant vector-tensor theory for the cosmological constant
Pavel Jiroušek, Alexander Vikman
We introduce a new Weyl-invariant and generally-covariant vector-tensor theory with higher derivatives. This theory can be induced by extending the mimetic construction to vector f…