f(R) Cosmology from q-theory
نویسندگان
چکیده
منابع مشابه
Supersymmetric Q-balls: theory and cosmology
MSSM predicts the existence of Q-balls, some of which can be entirely stable. Both stable and unstable Q-balls can play an important role in cosmology. In particular, Affleck–Dine baryogenesis can result in a copious production of stable baryonic Q-balls, which can presently exist as a form of dark matter. CERN-TH/98-218 June, 1998 Talk presented at the Sixth International Symposium on Particle...
متن کاملInflationary cosmology from STM theory of gravity
I study the power-law and de Sitter expansions for the universe during inflation from the STM theory of gravity. In a de Sitter expansion the additional dimension is related to the cosmological constant Λ = 3/ψ2. I find from experimental data that the mass of the inflaton field is m2 = 2/(3ψ2). In power-law expansion, the fifth coordinate (ψ) appears to be a dimensionless constant. The interest...
متن کاملLoop quantum cosmology from group field theory
We show that the effective dynamics of the recently proposed isotropic condensate state of group field theory with Laplacian kinetic operator can be equivalent to that of homogeneous and isotropic loop quantum cosmology in the improved dynamics quantization scheme, where the area of elementary holonomy plaquettes is constant. This constitutes a somewhat surprising example of a cosmological mode...
متن کاملString Theory and Cosmology
We discuss the main cosmological implications of considering string-loop eeects and a potential for the dilaton in the lowest order string eeective action. Our framework is based on the eeective model arising from regarding homogeneous and isotropic dilaton, metric and Yang-Mills eld conngurations. The issues of innation, entropy crisis and the Polonyi problem as well as the problem of the cosm...
متن کاملCosmology: Theory and Observations
The comparison of the Standard Cosmological Model (SCM) with astronomical observations, i.e. theory versus experiment, and with the Minimal Standard Model (MSM) in particle physics, i.e. theory versus theory, is discussed. The main issue of this talk is whether cosmology indicates new physics beyond the standard SU(3)× SU(2)× U(1) model with minimal particle content. The answer to this question...
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: JETP Letters
سال: 2008
ISSN: 0021-3640,1090-6487
DOI: 10.1134/s0021364008170013