31 citations · 65 across the 6 of their papers we have counts for
6 papers
Plane Gravitational Radiation from Neutrinos Source with Kalb-Ramond Coupling
C. N. Ferreira, J. A. Helayel-Neto, N. A. Tomimura
In this work, we propose a model based on a non-minimal coupling of neutrinos to a Kalb-Ramond field. The latter is taken as a possible source for gravitational radiation. As an im…
Gravitational Collapse of Circularly Symmetric Stiff Fluid with Self-Similarity in 2+1 Gravity
A. Y. Miguelote, N. A. Tomimura, Anzhong Wang
Linear perturbations of homothetic self-similar stiff fluid solutions, , with circular symmetry in 2+1 gravity are studied. It is found that, except for those with an…
Gravitational Collapse of Self-Similar Perfect Fluid in 2+1 Gravity
A. Y. Miguelote, N. A. Tomimura, Anzhong Wang
Perfect fluid with kinematic self-similarity is studied in 2+1 dimensional spacetimes with circular symmetry, and various exact solutions to the Einstein field equations are given.…
Evolution of the Density Contrast with Particle Production in a Gauge-Invariant Formalism
M. de Campos, N. Tomimura
In this work we derive the evolution equation for the density contrast considering open system cosmology, where the influence of adiabatic particle production process on the dynami…
An analysis of cosmological perturbations in hydrodynamical and field representations
J. C. Fabris, S. V. B. Goncalves, N. A. Tomimura
Density fluctuations of fluids with negative pressure exhibit decreasing time behaviour in the long wavelength limit, but are strongly unstable in the small wavelength limit when a…
Some Quantum Aspects of Three-Dimensional Einstein-Chern-Simons-Proca Massive Gravity
Carlos Pinheiro, Gentil O. Pires, N. Tomimura
We present a 3-dimensional model for massive gravity with masses induced by topological (Chern-Simons) and Proca-like mass terms. Causality and unitarity are discussed at tree-leve…