We investigate path integral quantization of two versions of unimodular gravity. First a fully diffeomorphism-invariant theory is analyzed, which does not include a unimodular condition on the metric, while still being ...

O presente estudo, que constitui um trabalho de conclusão de curso de especialização em Teoria da Relatividade, tem como objetivo solucionar o problema da constante cosmológica com uso da teoria alternativa à Relatividade ...

This paper is devoted to the construction of a unified formalism for Palatini and unimodular gravity. The idea is to employ a relationship between unified formalism for a Griffiths variational problem and its classical ...

We study the finite time singularity correspondence between the Jordan and Einstein frames for various F(R) gravity theories. Particularly we investigate the ordinary pure F(R) gravity case and the unimodular F(R) gravity ...

This paper is dedicated to the study of interactions between stationary field sources for the linearized unimodular gravity or the Weyl plus transverse diffeomorphism (WTDIFF) theory in a model that exhibits Lorentz-symmetry ...

There are two covariant descriptions of massless spin-2 particles in D= 3 + 1 via a symmetric rank-2 tensor: the linearized Einstein–Hilbert (LEH) theory and the Weyl plus transverse diffeomorphism (WTDIFF) invariant model. ...

Here we perform the Kaluza–Klein dimensional reduction from D+ 1 to D dimensions of massless Lagrangians described by a symmetric rank-2 tensor and invariant under transverse differmorphisms (TDiff). They include the ...