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2012

De Sitter String Vacua from Dilaton-dependent Non-perturbative Effects

Cicoli, Michele, Maharana, Anshuman, Quevedo, F. et al.

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We consider a novel scenario for modulus stabilisation in IIB string compactifications in which the Kahler moduli are stabilised by a general set-up with two kinds of non-perturbative effects: (i) standard Kahler moduli-dependent non-perturbative effects 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.

De Sitter String Vacua from Dilaton-dependent Non-perturbative Effects · Around

Built on

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2006
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D. Cremades, M. -P. Garcia del Moral, F. Quevedo and K. Suruliz, “Moduli stabilisation and de Sitter string vacua from magnetised D7 branes,” JHEP 0705
2007
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