Infrared behavior of Weyl gravity: Functional renormalization group approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342872" target="_blank" >RIV/68407700:21340/20:00342872 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.101.044050" target="_blank" >https://doi.org/10.1103/PhysRevD.101.044050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.101.044050" target="_blank" >10.1103/PhysRevD.101.044050</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Infrared behavior of Weyl gravity: Functional renormalization group approach

Popis výsledku v původním jazyce

Starting from an ultraviolet fixed point, we study the infrared behavior of quantum Weyl gravity in terms of a functional renormalization group (RG) flow equation. To do so, we employ two classes of Bach-flat backgrounds, namely maximally symmetric spacetimes and Ricci-flat backgrounds in the improved one-loop scheme. We show that in the absence of matter fields and with a topological term included, the effective action exhibits dynamical breaking of scale symmetry. In particular, it is shown that apart from a genuine IR fixed point that is reached at a zero value of the running scale, the RG flow also exhibits bouncing behavior in the IR regime. We demonstrate that both beta(C) and beta(E) reach the RG turning point (almost) simultaneously at the same finite energy scale, irrespective of the chosen background. The IR fixed point itself is found to be IR stable in the space of the considered couplings. Ensuing scaling dimensions of both operators are also computed. Salient issues, including the connection of the observed bouncing RG flow behavior with holography and prospective implications in early Universe cosmology, are also briefly discussed.

Název v anglickém jazyce

Infrared behavior of Weyl gravity: Functional renormalization group approach

Popis výsledku anglicky

Starting from an ultraviolet fixed point, we study the infrared behavior of quantum Weyl gravity in terms of a functional renormalization group (RG) flow equation. To do so, we employ two classes of Bach-flat backgrounds, namely maximally symmetric spacetimes and Ricci-flat backgrounds in the improved one-loop scheme. We show that in the absence of matter fields and with a topological term included, the effective action exhibits dynamical breaking of scale symmetry. In particular, it is shown that apart from a genuine IR fixed point that is reached at a zero value of the running scale, the RG flow also exhibits bouncing behavior in the IR regime. We demonstrate that both beta(C) and beta(E) reach the RG turning point (almost) simultaneously at the same finite energy scale, irrespective of the chosen background. The IR fixed point itself is found to be IR stable in the space of the considered couplings. Ensuing scaling dimensions of both operators are also computed. Salient issues, including the connection of the observed bouncing RG flow behavior with holography and prospective implications in early Universe cosmology, are also briefly discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

101

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

21

Strana od-do

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Kód UT WoS článku

000515692300008

EID výsledku v databázi Scopus

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