Results 91 to 100 of about 115,765 (198)

Path Integrals and the WKB approximation in Loop Quantum Cosmology

open access: yes, 2010
We follow the Feynman procedure to obtain a path integral formulation of loop quantum cosmology starting from the Hilbert space framework. Quantum geometry effects modify the weight associated with each path so that the effective measure on the space of ...
Ashtekar, Abhay   +2 more
core   +1 more source

OH Airglow for Ionospheric Seismology Applications—From Instrumental Noise Characterization to Rayleigh Waves Detection Threshold

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Airglow layers are powerful tracers of upper‐atmosphere dynamics because of their sensitivity to a broad spectrum of atmospheric wave phenomena. Seismic activity, and in particular Rayleigh waves, constitutes a forcing mechanism capable of generating infrasonic waves in the atmosphere.
P.‐Y. Froissart   +4 more
wiley   +1 more source

p-Adic and Adelic Cosmology: p-Adic Origin of Dark Energy and Dark Matter

open access: yes, 2006
A brief review of p-adic and adelic cosmology is presented. In particular, p-adic and adelic aspects of gravity, classical cosmology, quantum mechanics, quantum cosmology and the wave function of the universe are considered.
Dragovich, Branko
core   +2 more sources

Toward a Talanoa Way of Knowing: Relational Transformation for Environmental Sustainability and Climate Action

open access: yesAsia Pacific Viewpoint, Volume 67, Issue 1, Page 109-115, April 2026.
ABSTRACT This research note advances the idea of a talanoa epistemology. Many readers will be familiar with talanoa as an Indigenous mode of communication practiced in the Pacific. Variations of talanoa have been applied in COP constellations, inter‐faith meetings, Pacific diplomacy, conflict resolution, and as a research method.
Simon Hollis
wiley   +1 more source

Cosmology from quantum potential

open access: yesPhysics Letters B, 2015
It was shown recently that replacing classical geodesics with quantal (Bohmian) trajectories gives rise to a quantum corrected Raychaudhuri equation (QRE).
Ahmed Farag Ali, Saurya Das
doaj   +1 more source

Bounce Loop Quantum Cosmology Corrected Gauss-Bonnet Gravity

open access: yes, 2015
We develop a Gauss-Bonnet extension of Loop Quantum Cosmology, by introducing holonomy corrections in modified $F(\mathcal{G})$ theories of gravity.
Haro, J.   +4 more
core   +2 more sources

A New Padé Approach to Modeling Wormholes in Dekel‐Zhao Dark Matter Halos

open access: yesAnnalen der Physik, Volume 538, Issue 3, March 2026.
A matter‐first Padé strategy is introduced to build traversable wormholes from prescribed dark‐matter halos. Rational Padé fits approximately the Dekel–Zhao density and are analytically integrated to obtain a shape function that exactly reproduces the intended matter content, avoiding spurious poles of geometry‐first schemes.
Jonathan Alves Rebouças   +4 more
wiley   +1 more source

Inflationary cosmology in modified gravity theories

open access: yes, 2015
We review inflationary cosmology in modified gravity such as $R^2$ gravity with its extensions in order to generalize the Starobinsky inflation model. In particular, we explore inflation realized by three kinds of effects: modification of gravity, the ...
Bamba, Kazuharu, Odintsov, Sergei D.
core   +2 more sources

A Re‐Examination of Foundational Elements of Cosmology

open access: yesFortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source

Classical and quantum cosmology of Fab Four John theories

open access: yesPhysics Letters B, 2019
We study the John term of Fab Four cosmology in the presence of a scalar potential. We show here how this theory can describe a wide range of cosmological solutions.
Isaac Torres   +2 more
doaj   +1 more source

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