de Sitter string vacua from dilaton-dependent non-perturbative effects

By M. Cicoli, Anshuman Maharana, F. Quevedo, C. Burgess. 2012

133 citations recorded by the source corpus.

A bstractWe consider a novel scenario for modulus stabilisation in IIB string compactifications in which the Kähler moduli are stabilised by a general set-up with two kinds of non-perturbative effects: (i) standard Kähler moduli-dependent non-perturbative ef fects from gaugino condensation on D7-branes or E3-instantons wrapping four-cycles in the geometric regime; (ii) dilaton-dependent non-perturbative effects from gaugino condensation on space-time filling D3-branes or E(-1)-instantons at singularities. For the LARGE Volume Scenario (LVS), the new dilaton-dependent non-perturbative effects provide a positive definite contribution to the scalar potential that can be arbitrarily tuned from fluxes to give rise to de Sitter vacua. Contrary to anti D3-branes at warped throats, this term arises from a manifestly supersymmetric effective action. In this new scenario the ‘uplifting’ term comes from F-terms of blow-up modes resolving the singularity of the non-perturbative quiver. We discuss phenomenological and cosmological implications of this mechanism. This set-up also allows a realisation of the LVS for manifolds with zeroor positive Euler number.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5b6e44aa1f2d1b9973c48136383c253169aaeeed

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Citations in the corpus

Primordial black holes from string inflation (2018, background): “Moreover, all these corrections give rise to an AdS vacuum which needs to be uplifted to dS by the inclusion of anti-branes [24–26], hidden sector T-branes [27–29] or non-perturbative effects at singularities [30].”
The Swampland: Introduction and Review (2019, background): “This is not a serious obstruction, for example it may be possible to start from a non-supersymmetric vacuum as in the LVS scenario, and uplift that using D-terms [509,517–520].”
De Sitter vs Quintessence in String Theory (2018, background): “• Dilaton dependent non-perturbative effects [87]: In type IIB models hidden and observable sectors can be localised on either D3 or D7-branes.”
The type IIB string axiverse and its low-energy phenomenology (2012, methodology): “Notice that this vacuum can be uplifted to a dS solution within a manifestly supersymmetric EFT by using the positive contribution coming from E(-1)/D3 non-perturbative effects at a singularity [39].”
D-branes at del Pezzo singularities: global embedding and moduli stabilisation (2012, background): “This semi-positive definite D-term contribution is crucial to realise LVS dS vacua [65].”