Results 21 to 30 of about 37,871 (243)
Editorial: Loop Quantum Cosmology
Frontiers in Astronomy and Space Sciences, 2022 3 pags. Editorial on the Research Topic 3 pags. This work was partially supported by Project No. MICINN PID2020-118159GB-C41 from Spain. BE acknowledges financial support from the Standard Program of JSPS Postdoctoral Fellowships for Research in Japan. FV acknowledges financial support from by the Canada Research Chairs Program, the
Beatriz Elizaga Navascués +3 more
doaj +3 more sources
Homogeneous loop quantum cosmology [PDF]
Classical and Quantum Gravity, 2003 25 pages, 3 ...
Martin Bojowald
openalex +7 more sources
Loop quantum gravity and cosmological constant
Physics Letters B, 2021 A one-parameter regularization freedom of the Hamiltonian constraint for loop quantum gravity is analyzed. The corresponding spatially flat, homogenous and isotropic model includes the two well-known models of loop quantum cosmology as special cases. The
Xiangdong Zhang, Gaoping Long, Yongge Ma
doaj +4 more sources
Absence of a Singularity in Loop Quantum Cosmology [PDF]
Physical Review Letters, 2001 It is shown that the cosmological singularity in isotropic minisuperspaces is naturally removed by quantum geometry. Already at the kinematical level, this is indicated by the fact that the inverse scale factor is represented by a bounded operator even though the classical quantity diverges at the initial singularity.
Martin Bojowald
openalex +5 more sources
Inhomogenous loop quantum cosmology with matter
Journal of Physics: Conference Series, 2012 The linearly polarized Gowdy $T^3$ model with a massless scalar field with the same symmetries as the metric is quantized by applying a hybrid approach. The homogeneous geometry degrees of freedom are loop quantized, fact which leads to the resolution of
Blas, Daniel Martín-de +2 more
core +5 more sources
Fermions in Hybrid Loop Quantum Cosmology [PDF]
Physical Review D, 2017 This work pioneers the quantization of primordial fermion perturbations in hybrid Loop Quantum Cosmology (LQC). We consider a Dirac field coupled to a spatially flat, homogeneous, and isotropic cosmology, sourced by a scalar inflaton, and treat the Dirac
Martín-Benito, Mercedes +2 more
core +3 more sources
Singularities in Loop Quantum Cosmology [PDF]
Physical Review Letters, 2008 5 pages, 3 figures. v2: Comments and references added.
Kevin Vandersloot +4 more
openaire +6 more sources
Cosmic Tangle: Loop Quantum Cosmology and CMB Anomalies
Universe, 2021 Loop quantum cosmology is a conflicted field in which exuberant claims of observability coexist with serious objections against the conceptual and physical viability of its current formulations.
Martin Bojowald
doaj +1 more source
Is a loopy and noncommutative early Universe viable?
Physics Letters B, 2023 We conduct a (pre-)inflationary dynamics study of the chaotic quadratic potential within the framework of a simple noncommutative extension of effective loop quantum cosmology put forward recently.
Luis Rey Díaz-Barrón +3 more
doaj +1 more source
Tachyon field in loop cosmology
Physics Letters B, 2020 The evolutionary pictures of tachyon field in modified loop cosmology have been investigated. We present the dynamical behavior of the tachyon field associated with an exponential potential and find that the pre-inflation dynamics are very similar in ...
Kui Xiao
doaj +1 more source