One-loop quantum gravitational backreaction on the local Hubble rate

被引：10

作者：

Froeb, Markus B. ^{[1
,2
]}

机构：

[1] Univ Leipzig, Inst Theoret Phys, Bruderstr 16, D-04103 Leipzig, Germany

[2] Univ York, Dept Math, York YO10 5DD, N Yorkshire, England

来源：

CLASSICAL AND QUANTUM GRAVITY | 2019年 / 36卷 / 09期

基金：

欧盟地平线“2020”;

关键词：

perturbative quantum gravity; invariant observables; Hubble rate; DRESSED MATTER; SCALAR FIELD; OBSERVABLES; EQUILIBRIUM; GRAVITY; CHARGES; TIME;

D O I：

10.1088/1361-6382/ab10fb

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We determine corrections to the Hubble rate due to graviton loops in a cosmological background spacetime of constant deceleration parameter. The corrections are gauge-invariant, based on a recent proposal for all-order gauge-invariant observables in perturbative quantum gravity. We find explicit expressions for the cases of matter- and radiation-dominated eras and slow-roll inflation with vanishing second slow-roll parameter. Interestingly, in the latter case the corrections can be described by a quantum-corrected first slow-roll parameter, which brings the spacetime closer to de Sitter space.

引用

页数：29

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