Results 121 to 130 of about 624,114 (277)
Positive cosmological constant in loop quantum cosmology [PDF]
Physical Review D, 2012 The k=0 Friedmann Lemaitre Robertson Walker model with a positive cosmological constant and a massless scalar field is analyzed in detail. If one uses the scalar field as relational time, new features arise already in the Hamiltonian framework of classical general relativity: In a finite interval of relational time, the universe expands out to infinite
Abhay Ashtekar +3 more
openaire +3 more sources
Restrictions on curved cosmologies in modified gravity from metric considerations
Physics Letters B, 2015 This study uses very simple symmetry and consistency considerations to put constraints on possible Friedmann equations for modified gravity models in curved spaces. As an example, it is applied to loop quantum cosmology.
Linda Linsefors, Aurelien Barrau
doaj +1 more source
Universe, 2023 In recent decades, there has been growing interest in the quantization of black holes using techniques developed in loop quantum cosmology. Due to the quantum geometry effect, the resulting quantum-corrected black hole provides non-singular models.
Xiangdong Zhang
doaj +1 more source
Dreaming Ubuntu: Jungian Studies, Forgiveness, and Jung’s Recalcitrant Fourth
Journal of Analytical Psychology, Volume 70, Issue 2, Page 235-256, April 2025.Abstract Jung’s recalcitrant fourth comes in from a place of opposition, demanding that what has been neglected be considered. It is in the spirit of the fourth that the author examines the use of Ubuntu in Jungian literature, cautioning against a decontextualized appropriation of the notion that overlooks its diverse interpretations and usages ...
Barbara Cerminara
wiley +1 more source
Preinflationary dynamics of an α− attractor in loop quantum cosmology [PDF]
Physical Review D, 2018 We systematically study the preinflationary dynamics of the spatially flat Friedmann-Lemaitre-Robertson-Walker universe filled with a single scalar field that has the generalized $\ensuremath{\alpha}$-attractor potentials, in the framework of loop ...
M. Shahalam +3 more
semanticscholar +1 more source
Alternative quantization of the Hamiltonian in loop quantum cosmology II: Including the Lorentz term [PDF]
, 2009 Since there are quantization ambiguities in constructing the Hamiltonian constraint operator in isotropic loop quantum cosmology, it is crucial to check whether the key features of loop quantum cosmology are robust against the ambiguities. In this paper,
Ashtekar +24 more
core +4 more sources
Inhomogenous loop quantum cosmology with matter
Journal of Physics: Conference Series, 2012 4 pages, Contribution to the proceedings of the Loops 11-Madrid ...
Martin-de Blas, D. +2 more
openaire +5 more sources
Observational issues in loop quantum cosmology [PDF]
Classical and Quantum Gravity, 2014 75 pages, invited topical review for Classical and Quantum ...
Jakub Mielczarek +5 more
openaire +6 more sources
Bounce Loop Quantum Cosmology Corrected Gauss-Bonnet Gravity
, 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
New Hamiltonian constraint operator for loop quantum gravity
Physics Letters B, 2015 A new symmetric Hamiltonian constraint operator is proposed for loop quantum gravity, which is well defined in the Hilbert space of diffeomorphism invariant states up to non-planar vertices with valence higher than three. It inherits the advantage of the
Jinsong Yang, Yongge Ma
doaj +1 more source