De Sitter string vacua from perturbative Kähler corrections and consistent D-terms

Parameswaran, Susha L.; Westphal, Alexander

doi:10.1088/1126-6708/2006/10/079

Cited by 57 publications

(57 citation statements)

References 54 publications

(108 reference statements)

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“…Because of the absence of perturbative computations beyond leading order, it has proved very difficult to find controllable vacua in this regime (however, see e.g. [323,354,355]). …”

Section: Volume Stabilizationmentioning

confidence: 99%

Inflation and String Theory

2015

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“…Because of the absence of perturbative computations beyond leading order, it has proved very difficult to find controllable vacua in this regime (however, see e.g. [323,354,355]). …”

Section: Volume Stabilizationmentioning

confidence: 99%

Inflation and String Theory

2015

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“…We also have, e.g., 25) with other choices of integrand giving vanishing results. Using this, we have also picked the orientation of this cycle to be such that it is positively calibrated by Re Ω.…”

Section: Orientifold Planesmentioning

confidence: 99%

Toroidal orientifolds in IIA with general NS-NS fluxes

Ihl

Robbins

Wrase

2007

J. High Energy Phys.

184

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Type IIA toroidal orientifolds offer a promising toolkit for model builders, especially when one includes not only the usual fluxes from NS-NS and R-R field strengths, but also fluxes that are T-dual to the NS-NS three-form flux. These new ingredients are known as metric fluxes and non-geometric fluxes, and can help stabilize moduli or can lead to other new features. In this paper we study two approaches to these constructions, by effective field theory or by toroidal fibers twisted over a toroidal base. Each approach leads us to important observations, in particular the presence of D-terms in the four-dimensional effective potential in some cases, and a more subtle treatment of the quantization of the general NS-NS fluxes. Though our methods are general, we illustrate each approach on the example of an orientifold of T 6 /Z 4 .

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“…A similar scenario has been studied also by von Gersdorff and Hebecker [102]. In addition, Parameswaran and Westphal [103] studied the possibility to have a consistent D-term uplifting to de Sitter in this scenario. …”

Section: Survey Of Moduli Stabilisation Mechanismsmentioning

confidence: 77%

“…Therefore it has been put some effort on trying to perform a pure perturbative stabilisation of the Kähler moduli [101,102,103]. However, also this attempt turned out to require fine-tuning in the complex structure sector.…”

Section: The Type Iib Large Volume Scenariomentioning

confidence: 99%

String loop moduli stabilisation and cosmology in IIB flux compactifications

Cicoli¹

2010

Fortschritte der Physik

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We present a detailed review of the moduli stabilisation mechanism and possible cosmological implications of the LARGE Volume Scenario (LVS) that emerges naturally in the context of type IIB Calabi‐Yau flux compactifications. After a quick overview of physics beyond the Standard Model, we present string theory as the most promising candidate for a consistent theory of quantum gravity. We then give a pedagogical introduction to type IIB compactifications on Calabi‐Yau orientifolds where most of the moduli are stabilised by turning on background fluxes. However in order to fix the Kähler moduli one needs to consider several corrections beyond the leading order approximations. After presenting a survey of all the existing solutions to this problem, we derive the topological conditions on an arbitrary Calabi‐Yau to obtain the LVS since it requires no fine‐tuning of the fluxes and provides a natural solution of the hierarchy problem. After performing a systematic study of the behaviour of string loop corrections for general type IIB compactifications, we show how they play a crucial rôle to achieve full Kähler moduli stabilisation in the LVS. Before examining the possible cosmological implication of these scenarios, we present a broad overview of string cosmology. We then notice how, in the case of K3‐fibrations, string loop corrections give rise naturally to an inflationary model which yields observable gravity waves. We finally study the finite‐temperature behaviour of the LVS and discuss prospects for future work.

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De Sitter string vacua from perturbative Kähler corrections and consistent D-terms

Cited by 57 publications

References 54 publications

Inflation and String Theory

Inflation and String Theory

Toroidal orientifolds in IIA with general NS-NS fluxes

String loop moduli stabilisation and cosmology in IIB flux compactifications

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