Results 61 to 70 of about 32,194 (214)

A new kind of cyclic universe

Physics Letters B, 2019
Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale ...
Anna Ijjas, Paul J. Steinhardt
doaj   +1 more source

Unification of Conformal and Fuzzy Gravities With Internal Interactions Resulting in SO(10) and a Possible Probe Through Stochastic Gravitational Wave Background

Fortschritte der Physik, Volume 73, Issue 9-10, October 2025.
Abstract The unification of conformal and fuzzy gravities with internal interactions is based on the facts that i) the tangent group of a curved manifold and the manifold itself do not necessarily have the same dimensions and ii) both gravitational theories considered here have been formulated in a gauge theoretic way.
Gregory Patellis, Danai Roumelioti, Stelios Stefas, George Zoupanos   +3 more
wiley   +1 more source

Inflationary Cosmology from Noncommutative Geometry

, 1995
In the framework of the Connes-Lott model based on noncommutative geometry, the basic features of a gauge theory in the presence of gravity are reviewed, in order to show the possible physical relevance of this scheme for inflationary cosmology.
Lizzi, F., Mangano, G., Miele, G., Sparano, G.   +3 more
core   +1 more source

From the Big Bang Theory to the Theory of a Stationary Universe [PDF]

, 1994
We consider chaotic inflation in the theories with the effective potentials phi^n and e^{\alpha\phi}. In such theories inflationary domains containing sufficiently large and homogeneous scalar field \phi permanently produce new inflationary domains of a ...
A. Albrecht, A. Mezhlumian, A. Ortolan, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A.A. Starobinsky, A.A. Starobinsky, A.A. Starobinsky, A.A. Starobinsky, A.A. Starobinsky, A.A. Starobinsky, A.A. Starobinsky, A.B. Burd, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.D. Linde, A.H. Guth, A.H. Guth, A.H. Guth, A.R. Liddle, A.S. Goncharov, A.S. Goncharov, A.S. Goncharov, A.S. Goncharov, A.S. Goncharov, Andrei Linde, Arthur Mezhlumian, B.A. Sevastyanov, B.S. DeWitt, C.W. Gardiner, D. Amati, D. Amati, D. La, D.J. Gross, D.N. Page, D.S. Goldwirth, D.S. Salopek, D.S. Salopek, Dmitri Linde, E.B. Gliner, E.B. Gliner, E.B. Gliner, E.J. Copeland, E.W. Kolb, F. Lucchin, F.C. Adams, G. David, I.E. Gurevich, J. Bardeen, J. Halliwell, J.A. Wheeler, J.B. Hartle, J.D. Barrow, J.H. Kung, J.H. Kung, J.J. Halliwell, J.R. Gott, K. Freese, K. Nakao, K. Sato, L.A. Kofman, L.A. Kofman, L.P. Grishchuk, M. A. Markov, M. Aryal, M. Gasperini, M. Mijić, M. Mijić, M. Sasaki, M. Sasaki, N. Ikeda, P. Collins, P. Collins, P. Sikivie, P.J. Steinhardt, P.J. Steinhardt, P.J. Steinhardt, P.J.E. Peebles, R. Brandenberger, R. Brandenberger, R. Holman, R.L. Davis, S. Matarrese, S. Mollerach, S.W. Hawking, T.S. Bunch, V. Mukhanov, V.A. Rubakov, V.F. Mukhanov, V.F. Mukhanov, Y. Nambu, Y. Nambu, Ya. B. Zeldovich, Ya. B. Zeldovich   +118 more
core   +2 more sources

Strain Localization Along Aphrodite Terra's Chasmata System, Venus: The Role of Frictional Melting and Fault‐Melt Interaction

Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract We analyze large‐scale shear zones that are exposed along the equatorial chasmata of Eastern Aphrodite Terra to understand the role of strain localization in the deformation of the Venusian crust. These shear zones dip at low angles opposite to the slopes, forming terraces that expose portions of the shear planes.
Thomas Kenkmann, Oguzcan Karagoz, Monika Gurau   +2 more
wiley   +1 more source

Looking Beyond Inflationary Cosmology

, 2005
In spite of the phenomenological successes of the inflationary universe scenario, the current realizations of inflation making use of scalar fields lead to serious conceptual problems which are reviewed in this lecture.
Adams K., Albrecht P., Alexander R.H., Battefeld S., Bennett M., Berndsen J.M., Biswas R., Borde A., Brandenberger, Brandenberger, Brandenberger C., Brandenberger D.A., Brandenberger D.A., Brandenberger J.H., Brandenberger P.M., Brout F., Burgess J.M., Chu B.R., Corley T., Durrer M., Easson M., Easther B.R., Easther B.R., Feldman R.H., Gasperini G., Giddings S., Goldwirth T., Kallosh L., Kempf J.C., Khoury B.A., Kripfganz H., Majumdar A.-C., Mazenko R.M., Mukhanov G.V., Mukhanov H.A., Patil, R H Brandenberger, Randall, Smoot C.L., Tsamis R.P., Tseytlin C., Watson, Watson R.H.   +42 more
core   +1 more source

Against interpretive exclusivism* Contre l'exclusivisme interprétatif

Journal of the Royal Anthropological Institute, Volume 31, Issue 3, Page 645-662, September 2025.
Interpretive exclusivism is the dogma that we can only understand cultural systems by interpreting them, thereby ruling out causal explanations of cultural phenomena using scientific methods, for example based on measurement, comparison, and experiment.
Harvey Whitehouse
wiley   +1 more source

Inflationary Cosmology and Oscillating Universes in Loop Quantum Cosmology

, 2004
We study oscillatory universes within the context of Loop Quantum Cosmology. We make a comparative study of flat and positively curved universes sourced by scalar fields with either positive or negative potentials.
Bojowald M., Bojowald M., DAVID J. MULRYNE, JAMES E. LIDSEY, Kanekar N., Lidsey J. E., N. J. NUNES, REZA TAVAKOL, Rovelli C., Singh P.   +9 more
core   +1 more source

Tsallisian Gravity and Cosmology

Advances in High Energy Physics, 2020
In this paper, we adopt the Verlinde hypothesis on the origin of gravity as the consequence of the tendency of systems to increase their entropy and employ the Tsallis statistics.
Kavoos Abbasi, Shirvan Gharaati
doaj   +1 more source

The Fundamental Roles of the de Sitter Vacuum

Universe, 2020
We overview the fundamental roles of the de Sitter vacuum in cosmology where it is responsible for powering the early inflationary stage(s) and the present accelerated expansion, in black hole physics where it provides the existence of a wide class of ...
Irina Dymnikova
doaj   +1 more source