Results 21 to 30 of about 74,976 (149)
Symmetry, Integrability and Geometry: Methods and Applications, 2016 We shall discuss cosmological models in extended theories of gravitation. We shall define a surface, called the model surface, in the space of observable parameters which characterises families of theories. We also show how this surface can be used to compare with observations.
CAPOZZIELLO, SALVATORE +4 more
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Light trajectory and shadow shape in the rotating naked singularity
European Physical Journal C: Particles and Fields, 2022 In this paper, we investigate the light trajectories and shadow properties in the rotating version of null naked singularity (NNS) spacetime which is derived using the Newman–Janis algorithm without complexification method.
Vishva Patel +4 more
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Physical Review D, 2020 We compute the quantum circuit complexity of the evolution of scalar curvature perturbations on expanding backgrounds, using the language of squeezed vacuum states. In particular, we construct a simple cosmological model consisting of an early-time period of de Sitter expansion followed by a radiation-dominated era and track the evolution of complexity
Arpan Bhattacharyya +3 more
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The Cosmological Constant [PDF]
Annual Review of Astronomy and Astrophysics, 1992 50 pages.
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Physical Review Letters, 2007 We explore nonlocally modified models of gravity, inspired by quantum loop corrections, as a mechanism for explaining current cosmic acceleration. These theories enjoy two major advantages: they allow a delayed response to cosmic events, here the transition from radiation to matter dominance, and they avoid the usual level of fine tuning; instead ...
Deser, S., Woodard, R. P.
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The concept of fractal cosmos, I: Anaxagoras’ cosmology [PDF]
Serbian Astronomical Journal, 2001 The concept of a fractal cosmos occupies a prominent position in the modern cosmology. We trace the development of this concept from the presocratic Greece to the present state of affairs.
Grujić P.V.
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International Journal of Geometric Methods in Modern Physics, 2014 The possibility has been recently demonstrated to manufacture (nonrelativistic, Hamiltonian) many-body problems which feature an isochronous time evolution with an arbitrarily assigned period T yet mimic with good approximation, or even exactly, any given many-body problem (within a large, physically relevant, class) over times [Formula: see text ...
Briscese F., Calogero F.
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Emergent cosmology from matrix theory
Journal of High Energy Physics, 2022 Matrix theory is a proposed non-perturbative definition of superstring theory in which space is emergent. We begin a study of cosmology in the context of matrix theory.
Suddhasattwa Brahma +2 more
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New Journal of Physics, 2004 I review the basics of neutrino cosmology, from the question of neutrino decoupling and the presence of sterile neutrinos to the effects of neutrinos on the cosmic microwave background and large scale structure. Particular emphasis is put on cosmological neutrino mass measurements, both the present bounds and the future prospects.
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When misinterpreting the Bible becomes a habit
HTS Teologiese Studies/Theological Studies, 2018 Ancient Near Eastern (ANE) texts should be interpreted against the background of the magico-mythical cosmology of their time, and the Bible is no exception.
Peet J. van Dyk
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