Enhanced instability of de Sitter space in Einstein-Gauss-Bonnet gravity

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We show that the addition of a topological Gauss-Bonnet term to the gravitational action can greatly increase the instability of four-dimensional de Sitter space by favoring the nucleation of black holes. The pair-production rate given by the Euclidean action for the instanton takes the form exp(ΔS) where S is the entropy in Einstein-Gauss-Bonnet theory. The coefficient of the Gauss-Bonnet term in the action sets a stability bound on the curvature of empty de Sitter space. For that coefficient in the low-energy effective action of heterotic string theory, the maximal curvature of de Sitter space is, in general, much lower than the Planck scale.

Original languageEnglish (US)
Article number044048
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number4
DOIs
StatePublished - Aug 18 2011

Fingerprint

gravitation
curvature
coefficients
instantons
pair production
string theory
nucleation
entropy
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

@article{f6599a33aaea4d1da255cc9a7330907f,
title = "Enhanced instability of de Sitter space in Einstein-Gauss-Bonnet gravity",
abstract = "We show that the addition of a topological Gauss-Bonnet term to the gravitational action can greatly increase the instability of four-dimensional de Sitter space by favoring the nucleation of black holes. The pair-production rate given by the Euclidean action for the instanton takes the form exp(ΔS) where S is the entropy in Einstein-Gauss-Bonnet theory. The coefficient of the Gauss-Bonnet term in the action sets a stability bound on the curvature of empty de Sitter space. For that coefficient in the low-energy effective action of heterotic string theory, the maximal curvature of de Sitter space is, in general, much lower than the Planck scale.",
author = "Maulik Parikh",
year = "2011",
month = "8",
day = "18",
doi = "10.1103/PhysRevD.84.044048",
language = "English (US)",
volume = "84",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "4",

}

TY - JOUR

T1 - Enhanced instability of de Sitter space in Einstein-Gauss-Bonnet gravity

AU - Parikh, Maulik

PY - 2011/8/18

Y1 - 2011/8/18

N2 - We show that the addition of a topological Gauss-Bonnet term to the gravitational action can greatly increase the instability of four-dimensional de Sitter space by favoring the nucleation of black holes. The pair-production rate given by the Euclidean action for the instanton takes the form exp(ΔS) where S is the entropy in Einstein-Gauss-Bonnet theory. The coefficient of the Gauss-Bonnet term in the action sets a stability bound on the curvature of empty de Sitter space. For that coefficient in the low-energy effective action of heterotic string theory, the maximal curvature of de Sitter space is, in general, much lower than the Planck scale.

AB - We show that the addition of a topological Gauss-Bonnet term to the gravitational action can greatly increase the instability of four-dimensional de Sitter space by favoring the nucleation of black holes. The pair-production rate given by the Euclidean action for the instanton takes the form exp(ΔS) where S is the entropy in Einstein-Gauss-Bonnet theory. The coefficient of the Gauss-Bonnet term in the action sets a stability bound on the curvature of empty de Sitter space. For that coefficient in the low-energy effective action of heterotic string theory, the maximal curvature of de Sitter space is, in general, much lower than the Planck scale.

UR - http://www.scopus.com/inward/record.url?scp=80052853315&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052853315&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.84.044048

DO - 10.1103/PhysRevD.84.044048

M3 - Article

AN - SCOPUS:80052853315

VL - 84

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 4

M1 - 044048

ER -