Gödel-type solution in f(R,T) modified gravity
نویسندگان
چکیده
منابع مشابه
Multicomponent solution in modified theory of gravity
We study the modified theory of gravity in Friedmann Robertson Walker universe composed of several perfect fluids. We consider the power law inflation and determine the equation of state parameters in terms of the parameters of modified gravity’s Lagrangian. We also discuss briefly the gravitational baryogenesis in this model.
متن کامل- qc / 0 40 60 16 v 1 4 J un 2 00 4 Gödel type solution in teleparallel gravity
The stationary cosmological model without closed timelike curves of Gödel type is obtained for the ideal dust matter source within the framework of the teleparallel gravity. For a specific choice of the teleparallel gravity parameters, this solution reproduces the causality violating stationary Gödel solution in general relativity, in accordance with the teleparallel equivalent of general rel-a...
متن کاملViscosity in Modified Gravity
A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, based on a natural scaling law for the viscosity, a simple solution can be found for quantities such as the Hubble parameter and the energy density. These solutions may incorporate a viscosity-induced Big Rip singularity. By introducing a phase transition in the cosmic fluid, the future singularity can nevert...
متن کاملLocal stability criterion for self-gravitating disks in modified gravity
We study local stability of self-gravitating fluid and stellar disk in the context of modified gravity theories which predict a Yukawa-like term in the gravitational potential of a point mass. We investigate the effect of such a Yukawa-like term on the dynamics of self-gravitating disks. More specifically, we investigate the consequences of the presence of this term for the local stability of t...
متن کاملGödel Type solution with rotation , expansion and closed time - like curves by
We propose a time-varying parameter α for Gödel metric and an energy momentum tensor corresponding to this geometry is found. To satisfy covariance arguments timevarying gravitational and cosmological term are introduced. The “Einstein’s equation” for this special evolution for the Universe are written down where expansion, rotation and closed time-like curves appear as a combination between st...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2015
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732315502144