Loop quantum gravity and cosmological constant

Loop quantum gravity and cosmological constant

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 quantum bounce nature is tenable in the gener...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Xiangdong Zhang, Gaoping Long, Yongge Ma
Formato: article
Lenguaje:EN
Publicado: Elsevier 2021
Materias:
Cosmological constant
Loop quantum cosmology
Effective equation
Physics
QC1-999
Acceso en línea:https://doaj.org/article/8ef54a8d0f0e4b2eb11053d42cc15249
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:8ef54a8d0f0e4b2eb11053d42cc15249
record_format dspace
spelling oai:doaj.org-article:8ef54a8d0f0e4b2eb11053d42cc152492021-12-04T04:32:41ZLoop quantum gravity and cosmological constant0370-269310.1016/j.physletb.2021.136770https://doaj.org/article/8ef54a8d0f0e4b2eb11053d42cc152492021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321007103https://doaj.org/toc/0370-2693A 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 quantum bounce nature is tenable in the generalized cases. For positive value of the regularization parameter, the effective Hamiltonian leads to an asymptotic de-Sitter branch of the Universe connecting to the standard Friedmann branch by the quantum bounce. Remarkably, by suitably choosing the value of the regularization parameter, the observational cosmological constant can emerge at large volume limit from the effect of quantum gravity, and the effective Newtonian constant satisfies the experimental restrictions in the meantime.Xiangdong ZhangGaoping LongYongge MaElsevierarticleCosmological constantLoop quantum cosmologyEffective equationPhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136770- (2021)
institution DOAJ
collection DOAJ
language EN
topic Cosmological constant
Loop quantum cosmology
Effective equation
Physics
QC1-999
spellingShingle Cosmological constant
Loop quantum cosmology
Effective equation
Physics
QC1-999
Xiangdong Zhang
Gaoping Long
Yongge Ma
Loop quantum gravity and cosmological constant
description 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 quantum bounce nature is tenable in the generalized cases. For positive value of the regularization parameter, the effective Hamiltonian leads to an asymptotic de-Sitter branch of the Universe connecting to the standard Friedmann branch by the quantum bounce. Remarkably, by suitably choosing the value of the regularization parameter, the observational cosmological constant can emerge at large volume limit from the effect of quantum gravity, and the effective Newtonian constant satisfies the experimental restrictions in the meantime.
format article
author Xiangdong Zhang
Gaoping Long
Yongge Ma
author_facet Xiangdong Zhang
Gaoping Long
Yongge Ma
author_sort Xiangdong Zhang
title Loop quantum gravity and cosmological constant
title_short Loop quantum gravity and cosmological constant
title_full Loop quantum gravity and cosmological constant
title_fullStr Loop quantum gravity and cosmological constant
title_full_unstemmed Loop quantum gravity and cosmological constant
title_sort loop quantum gravity and cosmological constant
publisher Elsevier
publishDate 2021
url https://doaj.org/article/8ef54a8d0f0e4b2eb11053d42cc15249
work_keys_str_mv AT xiangdongzhang loopquantumgravityandcosmologicalconstant
AT gaopinglong loopquantumgravityandcosmologicalconstant
AT yonggema loopquantumgravityandcosmologicalconstant
_version_ 1718373043412140032

Ejemplares similares