de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds

Basile, Ivano; Lanza, Stefano

doi:10.1007/jhep10(2020)108

Cited by 45 publications

(54 citation statements)

References 119 publications

(223 reference statements)

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“…Note however that this imposes a relation between the stabilized values of the dilaton and the volume. Finally, our findings are consistent with [30] because we have O5 sources. However the final verdict on the existence of such de Sitter vacuum can only be made after we stabilize thes a moduli and we take into account flux quantization.…”

Section: Introducing Anti-d9ssupporting

confidence: 91%

“…As an application, we study moduli stabilization within the 3D EFT framework which yields SUSY-AdS 3 vacua. We also consider a related setup involving brane-supersymmetry-breaking (BSB) that has been developed and studied for example in [24][25][26][27][28][29][30], which allows for non-SUSY Anti-de Sitter as well as de Sitter vacua. For the de Sitter vacua we study first only the volume-dilaton sector and we see that stable critical points are allowed, however when we also switch-on the shape moduli we find that they pose a threat to stabilization in de Sitter.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional flux vacua from IIB on co-calibrated G2 orientifolds

2021

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We derive the 3D N = 1 superpotential for the closed string sector of type IIB supergravity on toroidal O5 orientifolds with co-calibrated G2 structure and RR background flux. We find that such compactifications can provide full closed string moduli stabilization on supersymmetric $$\hbox {AdS}_3$$ AdS 3 vacua, and once we include brane-supersymmetry-breaking we also find indication for the existence of classical 3D de Sitter solutions. The latter however are rather difficult to reconcile with the “shape” moduli stabilization and flux quantization. We also discuss the possibility of achieving scale separation in $$\hbox {AdS}_3$$ AdS 3 and $$\hbox {dS}_3$$ dS 3 vacua, but such effects seem to be hindered by the geometric flux quantization.

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Section: Introducing Anti-d9ssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Three-dimensional flux vacua from IIB on co-calibrated G2 orientifolds

2021

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“…Ref. [9] proposed solutions of this dynamical tadpole with 9d Poincaré invariance, an d the dilaton varying over one spacetime dimension (see also [86,87] for more recent, related work). In the following we revisit the solution with dependence on one spatial coordinate y, from the vantage point of our Lessons.…”

Section: Jhep06(2021)170mentioning

confidence: 99%

Dynamical tadpoles, stringy cobordism, and the SM from spontaneous compactification

Buratti

Delgado

Uranga

2021

J. High Energ. Phys.

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We consider string theory vacua with tadpoles for dynamical fields and uncover universal features of the resulting spacetime-dependent solutions. We argue that the solutions can extend only a finite distance ∆ away in the spacetime dimensions over which the fields vary, scaling as ∆n∼$$ \mathcal{T} $$ T with the strength of the tadpole $$ \mathcal{T} $$ T . We show that naive singularities arising at this distance scale are physically replaced by ends of spacetime, related to the cobordism defects of the swampland cobordism conjecture and involving stringy ingredients like orientifold planes and branes, or exotic variants thereof. We illustrate these phenomena in large classes of examples, including AdS5×T1,1 with 3-form fluxes, 10d massive IIA, M-theory on K3, the 10d non-supersymmetric USp(32) strings, and type IIB compactifications with 3-form fluxes and/or magnetized D-branes. We also describe a 6d string model whose tadpole triggers spontaneous compactification to a semirealistic 3-family MSSM-like particle physics model.

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“…By computing the bounce action of the shell in the presence of a cloud of strings and a Schwarzschild mass in five dimensions, [8] showed that the preferred nucleation channel is a bubble with slightly sub-critical tension, giving a phenomenologically realistic four dimensional cosmological constant. Recently, a top down construction of a (p + 1) dimensional dS shellworld, via the nucleation of a p dimensional bubble in an AdS p+2 × S q bulk, was done for p = 1, 5 in ten dimensional non-supersymmetric string theory by [9].…”

Section: Introductionmentioning

confidence: 99%

Bubble needs strings

Banerjee

Danielsson

Giri

2021

J. High Energ. Phys.

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In this paper, we want to emphasize the pivotal role played by strings in the model realizing de Sitter using an expanding bubble, proposed and subsequently developed in [1–3]. Contrary to the Randall-Sundrum model of brane-localized gravity, we use the end points of radially stretched strings to obtain matter sourcing gravity induced on the bubble wall. This allows us to reinterpret the possible volume divergence coming from naive dimensional reduction as mass renormalization in four dimensional particle physics. Furthermore, we argue that the residual time dependence in the bulk, pointed out by some recent work as a possible shortcoming of such models, is automatically cured in presence of these stringy sources.

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de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds

Cited by 45 publications

References 119 publications

Three-dimensional flux vacua from IIB on co-calibrated G2 orientifolds

Three-dimensional flux vacua from IIB on co-calibrated G2 orientifolds

Dynamical tadpoles, stringy cobordism, and the SM from spontaneous compactification

Bubble needs strings

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