Local and Global Flatness in Cosmology
Journal of Modern Physics, 2019 We raise the question of how the curvature parameter k is related to the curvature of the universe. We also show that, for a cosmological model that can be interpreted geometrically as a pseudo-hypersphere with a time-dependent radius, the Einstein field equations are not sufficient to fully describe the model.
openaire +2 more sources
Loop Quantum Cosmology, Boundary Proposals, and Inflation
, 2003 Loop quantum cosmology of the closed isotropic model is studied with a special emphasis on a comparison with traditional results obtained in the Wheeler-DeWitt approach.
A. Ashtekar +26 more
core +1 more source
, 2004 42 pages, 2 figures. Original version has been modified by addition of tables and an explanation of the Hubble constant and Olbers' paradox; most recent modification the relationship of dark energy and dark ...
openaire +2 more sources
Spontaneous symmetry breaking in the BFSS model: analytical results using the Gaussian expansion method. [PDF]
Eur Phys J C Part Fields, 2023 Brahma S, Brandenberger R, Laliberte S.
europepmc +1 more source
Arguments against the flatness problem in classical cosmology: a review
, 2021 Phillip Helbig
openalex +2 more sources
Averaging generalized scalar field cosmologies II: locally rotationally symmetric Bianchi I and flat Friedmann–Lemaître–Robertson–Walker models [PDF]
, 2021 Genly León +5 more
openalex +1 more source
100 years of mathematical cosmology: Models, theories, and problems, Part A. [PDF]
Philos Trans A Math Phys Eng Sci, 2022 Cotsakis S, Yefremov AP.
europepmc +1 more source
Constant volume exponential solutions in Einstein–Gauss–Bonnet flat anisotropic cosmology with a perfect fluid [PDF]
, 2014 Dmitry Chirkov +2 more
openalex +1 more source
Temperature Scaling in Flat Space Cosmology in Comparison to Standard Cosmology
Journal of Modern Physics, 2018 Flat Space Cosmology (FSC) is a mathematical model of universal expansion which has proven to be remarkably accurate in comparison to observations. Temperature scaling is redefined in this paper in terms of a new “Universal Temperature” Tu scale according to Tu = T 2, where T 2 is in K2.
Eugene Terry Tatum +1 more
openaire +2 more sources
Homogeneous and isotropic cosmology in general teleparallel gravity. [PDF]
Eur Phys J C Part Fields, 2023 Heisenberg L, Hohmann M, Kuhn S.
europepmc +1 more source