de Sitter vacua from ten dimensions

Kachru, Shamit; Kim, Manki; McAllister, Liam; Zimet, Max

doi:10.1007/jhep12(2021)111

Cited by 42 publications

(67 citation statements)

References 83 publications

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“…One of the core reasons that fermions on branes are under-studied is that obtaining their couplings explicitly turns out to be surprisingly difficult. Higher-order couplings of fermions in brane actions have been invoked recently [25][26][27][28][29][30][31], however the impracticality of the existing methods used to obtain these terms limited their use. Very recently, a proposal for obtaining specific quartic couplings on D7-branes that can be pertinent for understanding KKLT has also been put forward [32].…”

Section: Discussionmentioning

confidence: 99%

“…[22][23][24]). More recently new developments in this sector have lead to an interest in higher order fermion terms on brane actions [25][26][27][28][29][30][31][32], bringing to this context open questions first posed by Hořava and Witten [33][34][35]. In the well-understood case of non-localized gauginos, supersymmetry gives rise to a 'perfect square' structure in the action [36], and it is not currently known how this structure extends to the case of localized gauginos.…”

Section: Introductionmentioning

confidence: 99%

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Branes, fermions, and superspace dualities

Retolaza,

Rogers,

Tatar

et al. 2021

Preprint

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We use the superspace formulation of supergravity in eleven and ten dimensions to compute fermion couplings on the M2-brane and on Dp-branes. In this formulation fermionic couplings arise naturally from the θ-expansion of the superfields from which the brane actions are constructed. The techniques we use and develop can in principle be applied to determine the fermionic couplings to general background fields up to arbitrary order. Starting with the superspace formulation of 11dimensional supergravity, we use a geometric technique known as the 'normal coordinate' method to obtain the θ-expansion of the M2-brane action. We then present a method which allows us to translate the knowledge of fermionic couplings on the M2-brane to knowledge of such couplings on the D2-brane, and then to any Dp-brane. This method is based on superspace generalizations of both the compactification taking 11-dimensional supergravity to type IIA supergravity and the T-duality rules connecting the type IIA and type IIB supergravities.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Branes, fermions, and superspace dualities

Retolaza,

Rogers,

Tatar

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…For example, comparing terms O(α 3 g 2 s ) and O(α 2 g 3 s ) can be hard. A very important part of ongoing supergravity research is to systematically analyse these corrections at all orders and ensure that Kähler moduli stabilisation is not spoiled in the bulk of moduli space (see for example [11][12][13][14][15]). Furthermore, since we lack a complete picture of non-perturbative supergravity, it is difficult to define frameworks where computations can be carried out under complete control.…”

Section: Introductionmentioning

confidence: 99%

Quadratic curvature corrections to stringy effective actions and the absence of de Sitter vacua

Cunillera

Emond

Lehébel

et al. 2022

J. High Energ. Phys.

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We investigate the combined effect of fluxes and higher-order curvature corrections, in the form of the Gauss-Bonnet term, on the existence of de Sitter vacua in a heterotic string inspired framework, compactified on spheres and tori. We first gain some intuition on the effects of these corrections by studying a perturbative expansion in the small Gauss-Bonnet coupling. Then, for choices of potential closer to the string theory predictions, we show that the inclusion of quadratic curvature corrections actually reduces the parametric likelihood of de Sitter solutions.

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“…[3][4][5][6]) have triggered intense scrutiny of these models. KKLT has arguably survived attacks related to the stability question of the anti-D3 uplift [7][8][9][10] and the gaugino condensate [11][12][13][14][15][16]. It is too early to judge how it will fare in view of the singular-bulk problem [17], which arises since one is forced to glue a large throat into a fairly small Calabi-Yau [12].…”

Section: Introductionmentioning

confidence: 99%

The LVS Parametric Tadpole Constraint

Gao,

Hebecker,

Schreyer

et al. 2022

Preprint

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The large volume scenario (LVS) for de Sitter compactifications of the type IIB string is, at least in principle, well protected from various unknown corrections. The reason is that, by construction, the Calabi-Yau volume is exponentially large. However, as has recently been emphasised, in practice the most explicit models are rather on the border of parametric control. We identify and quantify parametrically what we believe to be the main issue behind this difficulty. Namely, a large volume implies a shallow AdS minimum and hence a small uplift. The latter, if it relies on an anti-D3 in a throat, requires a large negative tadpole. As our main result, we provide a simple and explicit formula for what this tadpole has to be in order to control the most dangerous corrections. The fundamental ingredients are parameters specifying the desired quality of control. We comment on the interplay between our constraint and the tadpole conjecture. We also discuss directions for future work which could lead to LVS constructions satisfying the tadpole constraint with better control, as well as further challenges that may exist for the LVS. Our formula then represents a very concrete challenge for future searches for and the understanding of relevant geometries.

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de Sitter vacua from ten dimensions

Cited by 42 publications

References 83 publications

Branes, fermions, and superspace dualities

Branes, fermions, and superspace dualities

Quadratic curvature corrections to stringy effective actions and the absence of de Sitter vacua

The LVS Parametric Tadpole Constraint

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