Curvature corrections to KPV: do we need deep throats?

Hebecker, Arthur; Simon, Schreyer,; Venken, Gerben

doi:10.1007/jhep10(2022)166

Cited by 10 publications

(36 citation statements)

References 79 publications

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“…Indeed, one finds that there is always at least one type of correction which is not suppressed by any small parameter, making the naive LVS effective field theory unreliable [8,10]. Similar results were obtained in [11,12] taking into account the polarization channel of the anti-D3-brane(s) into an NS5-brane and in [13] for a less strongly warped variant of the LVS. 34 A possible way out would be if the numerical coefficients of the various corrections could be tuned small, e.g., through their complex-structure-moduli dependence [8,10].…”

Section: Jhep12(2023)196supporting

confidence: 63%

“…Nevertheless, a moderately small g s is sufficient to make the volume exponentially large, which naively suggests an excellent control over string and backreaction corrections. However, it turns out that this is not the case [8][9][10][11][12][13]. Indeed, one finds that there is always at least one type of correction which is not suppressed by any small parameter, making the naive LVS effective field theory unreliable [8,10].…”

Section: Jhep12(2023)196mentioning

confidence: 99%

“…Even worse, a number of recent works raised serious doubts about the selfconsistency of the approximation schemes underlying the most popular scenarios, i.e., the KKLT scenario [1], the LARGE-volume scenario [2] and the classical dS scenario [3,4]. A recurring theme in all three scenarios is that it is very difficult, if not impossible, to simultaneously suppress all relevant α ′ and backreaction corrections whenever the vacuum energy is naively positive [5][6][7][8][9][10][11][12][13][14][15][16][17]. 1 This leads to a loss of control and consequently a breakdown of the effective field theories in which the putative dS vacua arise.…”

Section: Introductionmentioning

confidence: 99%

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de Sitter-eating O-planes in supercritical string theory

Junghans

2023

J. High Energ. Phys.

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It has been proposed that flux compactifications of supercritical string theories (i.e., with spacetime dimension D > 10) have dS vacua, with large D acting as a control parameter for corrections to the classical spacetime effective action. In this paper, we provide a detailed analysis of the self-consistency of such models, focussing on α′ and backreaction corrections. We first show that all supercritical AdS, Minkowski and dS vacua in this setting have $$ \gtrsim \mathcal{O}(1) $$ ≳ O 1 curvature and/or field strengths in the string frame. This may be in tension with suppressing α′ corrections unless the coefficients of the higher-derivative terms have a sufficiently strong large-D suppression. We then argue that an additional and more severe problem arises in the dS case due to the backreaction of O-planes. In particular, we argue using a combination of geometric bounds and string-theory constraints that the O-plane backreaction is large in supercritical dS models. This implies that a large part of the naive classical geometry is eaten up by singular holes and thus indicates a breakdown of the classical description. Our finding resonates with several other recent results suggesting that string theory does not admit dS vacua in regimes where string and backreaction corrections are under control. As byproducts of our analysis, we derive a number of technical results that are useful beyond the specific applications in this paper. In particular, we compute the leading backreaction corrections to the smeared solution in a general flux compactification from D to d dimensions for an arbitrary distribution of O-planes and D-branes. We further argue for a general estimate for Green’s functions on compact manifolds (and therefore for the backreaction corrections) in terms of their diameter, volume and dimension.

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Section: Jhep12(2023)196supporting

confidence: 63%

Section: Jhep12(2023)196mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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de Sitter-eating O-planes in supercritical string theory

Junghans

2023

J. High Energ. Phys.

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“…As an alternative, an almost constant vacuum energy density driving the cosmic acceleration also can be explained by the quintessence model, in which the moduli slowly roll down the runaway potential with the small decay rate. If it can be well realized in the framework of string theory, we may account for the accelerating universe compatible with the observations without loss of the parametric control (see [7,8,9,10] for earlier discussions and [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31] for recent discussions concerning the parametric control). However, it turns out that when the unnatural corrections are suppressed such that the Kähler moduli roll down the runaway potential, the decay rate of the potential is too large, or equivalently, the potential is too steep, to explain the almost constant vacuum energy density [15,17].…”

Section: Introductionmentioning

confidence: 88%

Using Infographics for Improving Statistical Thinking Ability

Seo¹,

Lee²

2020

Institute Brain-based Edu Korea National Univ Edu

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We study the late time behavior of the slow-roll parameter in the stringy quintessence model when axion as well as saxion is allowed to move. Even though the potential is independent of the axion at tree level, the axion can move through its coupling to the saxion and the background geometry. Then the contributions of the axion kinetic energy to the slow-roll parameter and the vacuum energy density are not negligible when the slow-roll approximation does not hold. As the dimension of the field space is doubled, the fixed point at which the time variation of the slow-roll parameter vanishes is not always stable. We find that the fixed point in the saxion-axion system is at most partially stable, in particular when the volume modulus and the axio-dilaton, the essential ingredients of the string compactification, are taken into account. It seems that as we consider more saxion-axion pairs, the stability of the fixed point becomes difficult to achieve.

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“…For recent progress on engineering exponentiall small flux superpotential, see[6][7][8][9][10][11][12][13] 3. For recent studies on stability issues of strongly warped regions and anti-D3-brane supersymmetry breaking, see for example[17][18][19][20][21][22][23][24] 4. For recent progress on explicit constructions of KKLT like 4d N = 1 vacua, see[25] 5.…”

mentioning

confidence: 99%

On string one-loop correction to the Einstein-Hilbert term and its implications on the Kahler potential

Kim¹

2023

Preprint

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To compute the string one-loop correction to the Kähler potential of moduli fields of string compactifications in Einstein-frame, one must compute: the string one-loop correction to the Einstein-Hilbert action, the string one-loop correction to the moduli kinetic terms, the string one-loop correction to the definition of the holomorphic coordinates. In this note, we compute the string one-loop correction to the Einstein-Hilbert action of type II string theory compactified on orientifolds of Calabi-Yau threefolds. We find that the one-loop correction is determined by the new supersymmetric index studied by Cecotti, Fendley, Intriligator, and Vafa. As a simple application, we apply our results to estimate the size of the one-loop corrections around a conifold point in the Kähler moduli space.

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Curvature corrections to KPV: do we need deep throats?

Cited by 10 publications

References 79 publications

de Sitter-eating O-planes in supercritical string theory

de Sitter-eating O-planes in supercritical string theory

Using Infographics for Improving Statistical Thinking Ability

On string one-loop correction to the Einstein-Hilbert term and its implications on the Kahler potential

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