Some physical implications of regularization ambiguities in SU(2) gauge-invariant loop quantum cosmology [PDF]
Physical Review D, 2019 The way physics of loop quantum gravity is affected by the underlying quantization ambiguities is an open question. We address this issue in the context of loop quantum cosmology using gauge-covariant fluxes.
K. Liegener, Parampreet Singh
semanticscholar +1 more source
Loop cosmological dynamics and dualities with Randall-Sundrum braneworlds [PDF]
, 2006 The discrete quantum geometric effects play an important role in dynamical evolution in the loop quantum cosmology. These effects which are significant at the high energies lead to the quadratic energy density modifications to the Friedmann equation, as ...
A. Ashtekar +6 more
core +3 more sources
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
(b,v)-type variables for black to white hole transitions in effective loop quantum gravity
Physics Letters B, 2021 Quantum gravity effects in effective models of loop quantum gravity, such as loop quantum cosmology, are encoded in the choice of so-called polymerisation schemes.
Norbert Bodendorfer +2 more
doaj
Primordial power spectrum from the Dapor–Liegener model of loop quantum cosmology [PDF]
General Relativity and Gravitation, 2018 We compute the predictions for the power spectrum of scalar perturbations from a recent new proposal for the effective Hamiltonian of loop quantum cosmology.
I. Agulló
semanticscholar +1 more source
Inflationary spectra and observations in loop quantum cosmology [PDF]
J. Phys.: Conf. Ser. 360 (2012) 012027, 2011 We review some recent progress in the extraction of inflationary observables in loop quantum cosmology. Inverse-volume quantum corrections induce a growth of power in the large-scale cosmological spectra and are constrained by observations.
arxiv +1 more source
Revisiting pre-inflationary Universe of family of α -attractor in loop quantum cosmology [PDF]
Classical and quantum gravity, 2019 In this work, we revisit the dynamics of pre-inflationary Universe with a family of α-attractor potentials, in the framework of loop quantum cosmology, in which the big bang singularity is generically resolved purely with quantum geometric effects, and ...
M. Shahalam +3 more
semanticscholar +1 more source
Loop Quantum Cosmological Perturbations
Journal of Physics: Conference Series, 2014 This work was supported by the Project No.
Fernández Méndez, Mikel +2 more
openaire +3 more sources
Qualitative study in loop quantum cosmology [PDF]
Classical and Quantum Gravity, 2017 This work contains a detailed qualitative analysis, in General Relativity and in Loop Quantum Cosmology, of the dynamics in the associated phase space of a scalar field minimally coupled with gravity, whose potential mimics the dynamics of a perfect fluid with a linear Equation of State (EoS).
Aresté Saló, Llibert +2 more
openaire +6 more sources
Inflationary Cosmology and Quantization Ambiguities in Semi-Classical Loop Quantum Gravity [PDF]
, 2004 In loop quantum gravity, modifications to the geometrical density cause a self-interacting scalar field to accelerate away from a minimum of its potential.
A. Ashtekar +30 more
core +3 more sources