Results 11 to 20 of about 492,367 (339)

Modular Cosmology [PDF]

open access: yesPhysical Review D, 1995
An exploratory study of the cosmology of moduli in string theory. Moduli are argued to be natural inflaton fields and lead to a robust inflationary cosmology in which inflation takes place at the top of domain walls. The amplitude of microwave background
A. Albrecht   +54 more
core   +4 more sources

Early and late universe holographic cosmology from a new generalized entropy [PDF]

open access: yesPhysics Letters B, 2022
We propose a new four-parameter entropy function that generalizes the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for suitable limits of the parameters.
Shin'ichi Nojiri   +2 more
doaj   +2 more sources

Mirage Cosmology [PDF]

open access: yesJournal of High Energy Physics, 1999
A brane universe moving in a curved higher dimensional bulk space is considered. The motion induces a cosmological evolution on the universe brane that is indistiguishable from a similar one induced by matter density on the brane.
Kehagias, A., Kiritsis, E.
core   +8 more sources

The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters [PDF]

open access: yesAstrophysical Journal, 2023
We present cosmological constraints from a gravitational lensing mass map covering 9400 deg2 reconstructed from measurements of the cosmic microwave background (CMB) made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021.
M. Madhavacheril   +158 more
semanticscholar   +1 more source

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies [PDF]

open access: yesJournal of High Energy Astrophysics, 2022
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological probes, such as the disagreement in the value of the Hubble constant $H_0$,
E. Abdalla   +202 more
semanticscholar   +1 more source

Cosmology with the Laser Interferometer Space Antenna [PDF]

open access: yesLiving Reviews in Relativity, 2022
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and ...
P. Auclair   +179 more
semanticscholar   +1 more source

Teleparallel gravity: from theory to cosmology [PDF]

open access: yesReports on progress in physics. Physical Society, 2021
Teleparallel gravity (TG) has significantly increased in popularity in recent decades, bringing attention to Einstein’s other theory of gravity. In this Review, we give a comprehensive introduction to how teleparallel geometry is developed as a gauge ...
S. Bahamonde   +9 more
semanticscholar   +1 more source

Geometrothermodynamic Cosmology

open access: yesEntropy, 2023
We review the main aspects of geometrothermodynamics, a formalism that uses contact geometry and Riemannian geometry to describe the properties of thermodynamic systems. We show how to handle in a geometric way the invariance of classical thermodynamics with respect to Legendre transformations, which means that the properties of the systems do not ...
Orlando Luongo, Hernando Quevedo
openaire   +5 more sources

Nonlocal Cosmology [PDF]

open access: yesPhysical 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.
openaire   +5 more sources

Cosmological complexity [PDF]

open access: yesPhysical 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
openaire   +2 more sources

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