Are nonperturbative AdS vacua possible in bosonic string theory?

Self Cite

For the bosonic gravi-dilaton system, we provide systematical approaches to construct non-perturbative string cosmological solutions without curvature singularities, which can match the perturbative solution to any order in α ′ expansion. When higher order α ′ corrections are calculated, they can be straightforwardly plugged in to generate compatible non-perturbative evolutions without curvature singularities. We also give a (phenomenological) map between α ′ corrected EOM and loop corrected EOM. This map enables us to easily generate a loop corrected solution from an α ′ corrected solution, and vice versa, therefore substantially enlarges the solution space.

Section: Jhep01(2020)164mentioning

confidence: 72%

Construct α′ corrected or loop corrected solutions without curvature singularities

Wang

Yang

et al. 2020

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“…In other words, higher derivative corrections are absorbed into redefined fields by O (d, d) invariant field redefinitions. In our recent work [11], we found that the JHEP05(2021)218 classification of α corrections also applies to space-dependent background (domain-wall ansatz). We also presented non-singular string cosmological solutions in refs.…”

Section: Jhep05(2021)218mentioning

confidence: 94%

Derive Lovelock gravity from string theory in cosmological background

Wang

Yang

et al. 2021

Self Cite

It was proved more than three decades ago, that the first order α′ correction of string effective theory could be written as the Gauss-Bonnet term, which is the quadratic term of Lovelock gravity. In cosmological background, with an appropriate field redefinition, we reorganize the infinite α′ corrections of string effective action into a finite term expression for any specific dimension. This finite term expression matches Lovelock gravity exactly and thus fix the couplings of Lovelock gravity by the coefficients of string effective action. This result thus provides a strong support to string theory.

“…It would be interesting to apply our result to specific examples. Higher-derivative corrections to Abelian T-duality have been applied in different contexts, such as corrections to entropy and black-hole solutions [89][90][91][92][93] and cosmological backgrounds [94][95][96]. Higher-derivative corrections to Yang-Baxter deformations were recently considered in [45].…”

Section: Jhep10(2020)002 5 Outlookmentioning

confidence: 99%

Generalized dualities and higher derivatives

Codina

Marqués

2020

Generalized dualities had an intriguing incursion into Double Field Theory (DFT) in terms of local O(d, d) transformations. We review this idea and use the higher derivative formulation of DFT to compute the first order corrections to generalized dualities. Our main result is a unified expression that can be easily specified to any generalized T-duality (Abelian, non-Abelian, Poisson-Lie, etc.) or deformations such as Yang-Baxter, in any of the theories captured by the bi-parametric deformation (bosonic, heterotic strings and HSZ theory), in any supergravity scheme related by field redefinitions. The prescription allows further extensions to higher orders. As a check we recover some previously known particular examples.