Scale-separated AdS$_4$ vacua of IIA orientifolds and M-theory

Cribiori, Niccolò; Junghans, Daniel; Van Hemelryck, Vincent; Van Riet, Thomas; Wrase, Timm

doi:10.48550/arxiv.2107.00019

Cited by 19 publications

(63 citation statements)

References 51 publications

(202 reference statements)

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“…( 5). In addition to supporting the distance conjecture in the absence of supersymmetry, as we have discussed this result resonates with the absence of scale separation in AdS vacua [25,77,[111][112][113][114][115]. Furthermore, since the KK masses are proportional to a positive power of the AdS cosmological constant, the AdS version of the distance conjecture [25] holds as well.…”

Section: Bubble Nucleation and Holographysupporting

confidence: 78%

Emergent strings at infinite distance with broken supersymmetry

Basile¹

2022

Preprint

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We investigate the infinite-distance properties of families of unstable flux vacua in string theory with broken supersymmetry. To this end, we employ a generalized notion of distance in the moduli space and we build a holographic description for the non-perturbative regime of the tunneling cascade in terms of a renormalization group flow. In one limit we recover an exponentially light tower of Kaluza-Klein states, while in the opposite limit we find a tower of higher-spin excitations of D1-branes, realizing the emergent string proposal. In particular, the holographic description includes a free sector, whose emergent superconformal symmetry resonates with supersymmetric stability, the CFT distance conjecture and S-duality. We compute the anomalous dimensions of scalar vertex operators and single-trace higher-spin currents, finding an exponential suppression with the distance which is not generic from the renormalization group perspective, but appears specific to our settings.

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Section: Bubble Nucleation and Holographysupporting

confidence: 78%

Emergent strings at infinite distance with broken supersymmetry

Basile¹

2022

Preprint

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“…Checking whether the supergravity solutions actually meet the string effective theory requirements, allowing them to be in the classical string regime, is not always trivial: see e.g. [13] for de Sitter and [14] for anti-de Sitter. We leave that question aside in this work, the classification provided remaining sufficient for classical string backgrounds.…”

Section: Introduction and Results Summarymentioning

confidence: 99%

“…We finally consider anti-de Sitter solutions. Beyond references given in Table 8, we can mention the recent works [14,40] that have solutions in s 6666 . We find here new solutions in new classes: 5 in m 46 (with 3 sets of sources), and 4 in s 55 (with 2 sets of sources).…”

Section: Results: Known and Found Solutionsmentioning

confidence: 99%

Charting the landscape of (anti-) de Sitter and Minkowski solutions of 10d supergravities

Andriot,

Horer,

Marconnet

2022

Preprint

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We classify solutions of 10d type IIA/B supergravities with orientifolds, on a 4d maximally symmetric spacetime times a 6d group manifold. We then look for new solutions in previously unexplored solution classes, and find some: (anti-) de Sitter solutions with intersecting O 4 , O 6 and D 6 , or Minkowski solutions with 3 intersecting O 5 , among others. We provide the numerical code that we developed for this purpose. We also prove new no-go theorems against (anti-) de Sitter solutions. We finally conjecture the absence of de Sitter solution for 2 or less intersecting source sets, implying that a 4d effective theory with de Sitter is at most N = 1 supersymmetric.

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“…There is some debate about whether the DGKT-CFI models, which feature scale separation (in the sense that one can keep M tower V 1/2 0 /M 4 ) have some inconsistency (see e.g. [46][47][48][49][50][51][52][53][54]). We see that from the point of view of the four-dimensional EFT the spectrum is consistent with the holographic analysis performed here.…”

Section: /4mentioning

confidence: 99%

IR/UV Mixing, Towers of Species and Swampland Conjectures

Castellano,

Herráez,

Ibáñez

2021

Preprint

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By applying the Covariant Entropy Bound (CEB) to an EFT in a box of size 1/Λ IR one obtains that the UV and IR cut-offs of the EFT are necessarily correlated. We argue that in a theory of Quantum Gravity (QG) one should identify the UV cutoff with the 'species scale', and give a general algorithm to calculate it in the case of multiple towers becoming light. One then obtains an upper bound on the characteristic mass scale of the tower in terms of the IR cut-off, given byPlanck units, with α D = (D − 2 + p)/2p(D − 1), where p depends on the density of states. Identifying the IR cut-off with a (non-vanishing) curvature in AdS one reproduces the statement of the AdS Distance Conjecture (ADC), also giving an explicit lower bound for the α exponent.In particular, we find that the CEB implies α ≥ 1/2 in any dimension if there is a single KK tower, both in AdS and dS vacua. However values α < 1/2 are allowed if the particle tower is multiple or has a string component. We also consider the CKN constraint coming from avoiding gravitational collapse which further requires in general α ≥ 1/D for the lightest tower. We analyse the case of the DGKT-CFI class of Type IIA orientifold models and show it has both particle and string towers below the species scale, so that a careful analysis of how the ADC is defined is needed.We find that this class of models obey but do not saturate the CEB. The UV/IR constraints found apply to both AdS and dS vacua. We comment on possible applications of these ideas to the dS Swampland conjecture as well as to the observed dS phase of the universe.

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Scale-separated AdS$_4$ vacua of IIA orientifolds and M-theory

Cited by 19 publications

References 51 publications

Emergent strings at infinite distance with broken supersymmetry

Emergent strings at infinite distance with broken supersymmetry

Charting the landscape of (anti-) de Sitter and Minkowski solutions of 10d supergravities

IR/UV Mixing, Towers of Species and Swampland Conjectures

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