Inflation without self-reproduction in F(R) gravity
نویسندگان
چکیده
منابع مشابه
Modified teleparallel gravity: inflation without inflaton
Born-Infeld strategy to smooth theories having divergent solutions is applied to teleparallel equivalent of General Relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since teleparallel Lagrangian only contains first derivatives of the vierbein. We show that Born-Infeld-modified teleparallelism solves the particle horizon pro...
متن کاملScale-invariant cosmological perturbations from Hořava-Lifshitz gravity without inflation
Based on the renormalizable theory of gravitation recently proposed by Hořava, we present a simple scenario to generate almost scale-invariant, super-horizon curvature perturbations. The anisotropic scaling with dynamical critical exponent z = 3 implies that the amplitude of quantum fluctuations of a free scalar field generated in the early epoch of the expanding universe is insensitive to the ...
متن کاملMass Inflation in Quantum Gravity
Using the canonical formalism for spherically symmetric black hole inside the apparent horizon we investigate the mass inflation in the Reissner-Nordström black hole in the framework of quantum gravity. It is shown that like in classical gravity the combination of the effects of the influx coming from the past null infinity and the outflux backscattered by the black hole’s curvature causes the ...
متن کاملGravity Driven Inflation
The union of high-energy particle theories and gravitation often gives rise to an evolving strength of gravity. The standard picture of the earliest universe would certainly deserve revision if the Planck mass, which de nes the strength of gravity, varied. A notable consequence is a gravity-driven, kinetic in ation. Unlike standard in ation, there is no potential nor cosmological constant. The ...
متن کاملInflation from Quantum Gravity
In recent years cosmologists are repeatedly invoking quantum fluctuations to "explain" the origin of the universe [1 ]. We discuss here one such model in which our observed universe originates from a primordial "Planck size bubble" through inflation. The final state of the universe will have zero cosmological constant and zero spatial curvature with overwhelming probability. The analysis is bas...
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: Astrophysics and Space Science
سال: 2015
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-015-2288-5