Results 71 to 80 of about 1,530,241 (273)
Transport properties in the Horndeski holographic two-currents model
European Physical Journal C: Particles and Fields, 2023 The transport features of the holographic two-currents model are investigated in the Horndeski gravity framework. This system displays metallic or insulating characteristics depending on whether the Horndeski coupling parameter $$\gamma $$ γ is negative ...
Dan Zhang +4 more
doaj +1 more source
Polymer Dynamics of Isotropic Universe in Ashtekar and in Volume Variables
Universe, 2022 We analyze the semiclassical and quantum polymer dynamics of the isotropic Universe in terms of both the standard Ashtekar-Barbero-Immirzi connection and its conjugate momentum and also of the new generalized coordinate conjugate to the Universe volume ...
Eleonora Giovannetti +3 more
doaj +1 more source
Primordial power spectra for scalar perturbations in loop quantum cosmology [PDF]
, 2016 We provide the power spectrum of small scalar perturbations propagating in an inflationary scenario within loop quantum cosmology. We consider the hybrid quantization approach applied to a Friedmann-Robertson-Walker spacetime with flat spatial sections ...
Daniel Martín de Blas, J. Olmedo
semanticscholar +1 more source
Higher dimensional Loop Quantum Cosmology [PDF]
, 2015 Loop quantum cosmology(LQC) is the symmetric model of loop quantum gravity. In this paper, we generalize the structure of loop quantum cosmology to the theories with arbitrary spacetime dimensions.
Zhang, Xiangdong
core +2 more sources
The Finslerian quantum cosmology [PDF]
Canadian Journal of Physics, 2020 We present a Friedmann–Robertson–Walker quantum cosmological model within the framework of Finslerian geometry. In this work, we consider a specific fluid. We obtain the corresponding Wheeler–DeWitt equation as the usual constraint equation as well as the Schrödinger equation following Dirac, although the approaches yield the same time-independent ...
De, S.S., Rahaman, Farook, Paul, Nupur
openaire +3 more sources
Noncommutativity in Effective Loop Quantum Cosmology
Advances in High Energy Physics, 2019 We construct a noncommutative extension of the Loop Quantum Cosmology effective scheme for the flat FLRW model with a free scalar field via a theta deformation.
Abraham Espinoza-García +3 more
doaj +1 more source
The loop quantum cosmology bounce as a Kasner transition [PDF]
, 2017 For the Bianchi type I space-time (vacuum or with a massless scalar field), the loop quantum cosmology bounce can be viewed as a rapid transition between two classical solutions, with a simple transformation rule relating the Kasner exponents of the two ...
E. Wilson-Ewing
semanticscholar +1 more source
DECOHERENCE IN QUANTUM COSMOLOGY AND THE COSMOLOGICAL CONSTANT [PDF]
Modern Physics Letters A, 2013 We discuss a spacetime having the topology of S3×ℝ but with a different smoothness structure. The initial state of the cosmos in our model is identified with a wildly embedded 3-sphere (or a fractal space). In previous work we showed that a wild embedding is obtained by a quantization of a usual (or tame) embedding.
Jerzy Król, Torsten Asselmeyer-Maluga
openaire +3 more sources
Dynamical behavior of interacting dark energy in loop quantum cosmology
, 2010 The dynamical behaviors of interacting dark energy in loop quantum cosmology are discussed in this paper. Based on defining three dimensionless variables, we simplify the equations of the fixed points.
Chen X.-M. +5 more
core +1 more source
Quantum Nature of the Big Bang: Improved dynamics [PDF]
, 2006 An improved Hamiltonian constraint operator is introduced in loop quantum cosmology. Quantum dynamics of the spatially flat, isotropic model with a massless scalar field is then studied in detail using analytical and numerical methods.
A. Ashtekar +11 more
core +3 more sources