Inflation in warped geometries

Alex Buchel; Radu Roiban

doi:10.1016/j.physletb.2004.03.082

Inflation in warped geometries

Alex Buchel, Radu Roiban

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41 Scopus citations

Abstract

We argue that brane anti-brane inflation in string theory de-Sitter vacua of Kachru-Kallosh-Linde-Trivedi (KKLT) is captured by the dynamics of a D3-brane probe in the local KKLT model constructed in hep-th/0203041. This provides a framework to study in a controllable way corrections to the inflationary slow roll parameter η due to conformal symmetry breaking in a warped geometry throat. We compute the leading correction to η for the inflation in the Klebanov-Tseytlin throat geometry. We find that in certain regime this correction tends to decrease η. Computations in a different regime suggest however that it is unlikely that η≪1 can be achieved with the D3-brane throat inflation.

Original language	English (US)
Pages (from-to)	284-294
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	590
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2004.03.082
State	Published - Jun 24 2004

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2004.03.082

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title = "Inflation in warped geometries",

abstract = "We argue that brane anti-brane inflation in string theory de-Sitter vacua of Kachru-Kallosh-Linde-Trivedi (KKLT) is captured by the dynamics of a D3-brane probe in the local KKLT model constructed in hep-th/0203041. This provides a framework to study in a controllable way corrections to the inflationary slow roll parameter η due to conformal symmetry breaking in a warped geometry throat. We compute the leading correction to η for the inflation in the Klebanov-Tseytlin throat geometry. We find that in certain regime this correction tends to decrease η. Computations in a different regime suggest however that it is unlikely that η≪1 can be achieved with the D3-brane throat inflation.",

author = "Alex Buchel and Radu Roiban",

note = "Funding Information: We would like to thank Shamit Kachru, Joe Polchinski and Johannes Walcher for interesting discussions. A.B. would like to thank KITP for hospitality while this work was done. This research was supported in part by the National Science Foundation under Grant No. PHY99-07949 (A.B.) and PHY00-98395 (R.R.), as well as by the Department of Energy under Grant No. DE-FG02-91ER40618 (R.R.). Research at the Perimeter Institute (A.B.) is supported in part by funds from NSERC of Canada. ",

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doi = "10.1016/j.physletb.2004.03.082",

language = "English (US)",

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T1 - Inflation in warped geometries

AU - Buchel, Alex

AU - Roiban, Radu

N1 - Funding Information: We would like to thank Shamit Kachru, Joe Polchinski and Johannes Walcher for interesting discussions. A.B. would like to thank KITP for hospitality while this work was done. This research was supported in part by the National Science Foundation under Grant No. PHY99-07949 (A.B.) and PHY00-98395 (R.R.), as well as by the Department of Energy under Grant No. DE-FG02-91ER40618 (R.R.). Research at the Perimeter Institute (A.B.) is supported in part by funds from NSERC of Canada.

PY - 2004/6/24

Y1 - 2004/6/24

N2 - We argue that brane anti-brane inflation in string theory de-Sitter vacua of Kachru-Kallosh-Linde-Trivedi (KKLT) is captured by the dynamics of a D3-brane probe in the local KKLT model constructed in hep-th/0203041. This provides a framework to study in a controllable way corrections to the inflationary slow roll parameter η due to conformal symmetry breaking in a warped geometry throat. We compute the leading correction to η for the inflation in the Klebanov-Tseytlin throat geometry. We find that in certain regime this correction tends to decrease η. Computations in a different regime suggest however that it is unlikely that η≪1 can be achieved with the D3-brane throat inflation.

AB - We argue that brane anti-brane inflation in string theory de-Sitter vacua of Kachru-Kallosh-Linde-Trivedi (KKLT) is captured by the dynamics of a D3-brane probe in the local KKLT model constructed in hep-th/0203041. This provides a framework to study in a controllable way corrections to the inflationary slow roll parameter η due to conformal symmetry breaking in a warped geometry throat. We compute the leading correction to η for the inflation in the Klebanov-Tseytlin throat geometry. We find that in certain regime this correction tends to decrease η. Computations in a different regime suggest however that it is unlikely that η≪1 can be achieved with the D3-brane throat inflation.

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M3 - Article

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SN - 0370-2693

VL - 590

SP - 284

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Inflation in warped geometries

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