Results 81 to 90 of about 75,052 (218)
On solutions of loop quantum cosmology [PDF]
The European Physical Journal C, 2013 Loop quantum cosmology is considered in inflation era. A slow roll scalar field solution with power law potential is presented in the neighborhood of transition time, i.e. when the universe enters inflation phase from super-inflation. The compatibility of the model with Planck 2013 data is discussed. The domain of validity of second and the generalized
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The perturbed universe in the deformed algebra approach of Loop Quantum Cosmology
, 2016 Loop quantum cosmology is a tentative approach to model the universe down to the Planck era where quantum gravity settings are needed. The quantization of the universe as a dynamical space-time is inspired by Loop Quantum Gravity ideas. In addition, loop
Grain, J.
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Loop quantum cosmology and inhomogeneities [PDF]
General Relativity and Gravitation, 2006 Inhomogeneities are introduced in loop quantum cosmology using regular lattice states, with a kinematical arena similar to that in homogeneous models considered earlier. The framework is intended to encapsulate crucial features of background independent quantizations in a setting accessible to explicit calculations of perturbations on a cosmological ...
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Hysteresis and beating phenomena in loop quantum cosmology [PDF]
Physical Review D, 2019 Differences in pressure during expansion and contraction stages in cosmic evolution can result in a hysteresis-like phenomena in non-singular cyclic models sourced with scalar fields.
J. Dupuy, Parampreet Singh
semanticscholar +1 more source
Ekpyrotic loop quantum cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2013 11 pages, v2: Clarifications and references ...
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The mass of cosmological perturbations in Loop Quantum Cosmology
The Fifteenth Marcel Grossmann Meeting, 2022 Sixth Tux workshop on Quantum Gravity. Monday, February 19 to Friday, February 23. Tux, Austria (2018). ..-https://www.gravity.physik.fau.de/events/tux6/
Mena Marugán, Guillermo A. +2 more
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Loop quantum cosmology from an alternative Hamiltonian [PDF]
Physical Review D, 2019 In this paper, a new Hamiltonian constraint operator for loop quantum cosmology is constructed by using the Chern-Simons action. The quantum dynamics of the $k=0$ cosmological model with respect to a massless scalar field as an emergent time is ...
Jinsong Yang, Cong Zhang, Yongge Ma
semanticscholar +1 more source
Data‐Driven Review on Aerogels and Polymeric Aerogels
Angewandte Chemie International Edition, EarlyView.A review goes to data‐driven. An exhaustive literature survey provides an overview of research status on aerogels, a category of highly porous solids with unique physicochemical properties. Statistical/data‐driven analysis tells us positive/negative aspects; aerogels have a promising potential to contribute to emerging energy/environmental issues ...
Satoru Takeshita +2 more
wiley +1 more source
Perturbations in loop quantum cosmology
Journal of Physics: Conference Series, 2014 The era of precision cosmology has allowed us to accurately determine many important cosmological parameters, in particular via the CMB. Confronting Loop Quantum Cosmology with these observations provides us with a powerful test of the theory. For this to be possible we need a detailed understanding of the generation and evolution of inhomogeneous ...
Ivan Agullo +2 more
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Supersymmetric minisuperspace models in self-dual loop quantum cosmology
Journal of High Energy Physics, 2021 In this paper, we study a class of symmetry reduced models of N $$ \mathcal{N} $$ = 1 super- gravity using self-dual variables. It is based on a particular Ansatz for the gravitino field as proposed by D’Eath et al. We show that the essential part of the
K. Eder, H. Sahlmann
doaj +1 more source