منابع مشابه
D6-brane Splitting on Type IIA Orientifolds
We study the open-string moduli of supersymmetric D6-branes, addressing both the string and field theory aspects of D6-brane splitting on Type IIA orientifolds induced by open-string moduli Higgsing (i.e., their obtaining VEVs). Specifically, we focus on the Z 2 × Z 2 ori-entifolds and address the symmetry breaking pattern for D6-branes parallel with the orientifold 6-planes as well as those po...
متن کاملToroidal Orientifolds in IIA with General NS-NS Fluxes
Type IIA toroidal orientifolds offer a promising toolkit for model builders, especially when one includes not only the usual fluxes from NS-NS and R-R field strengths, but also fluxes that are T-dual to the NS-NS three-form flux. These new ingredients are known as metric fluxes and non-geometric fluxes, and can help stabilize moduli or can lead to other new features. In this paper we study two ...
متن کاملCrosscaps in Gepner Models and Type IIA Orientifolds
As a first step to a detailed study of orientifolds of Gepner models associated with CalabiYau manifolds, we construct crosscap states associated with anti-holomorphic involutions (with fixed points) of Calabi-Yau manifolds. We argue that these orientifolds are dual to M-theory compactifications on (singular) seven-manifolds with G2 holonomy. Using the spacetime picture as well as the M-theory ...
متن کاملThe effective action of Type IIA Calabi-Yau orientifolds
The N = 1 effective action for generic type IIA Calabi-Yau orientifolds in the presence of background fluxes is computed from a Kaluza-Klein reduction. The Kähler potential, the gauge kinetic functions and the flux-induced superpotential are determined in terms of geometrical data of the Calabi-Yau orientifold and the background fluxes. The moduli space is found to be a Kähler subspace of the N...
متن کاملN = 1 effective potential from dual type – IIA D 6 / O 6 orientifolds with general fluxes
We consider N = 1 compactifications of the type–IIA theory on the T /(Z2 × Z2) orbifold and O6 orientifold, in the presence of D6–branes and general NSNS, RR and Scherk–Schwarz geometrical fluxes. Introducing a suitable dual formulation of the theory, we derive and solve the Bianchi identities, and show how certain combinations of fluxes can relax the constraints on D6–brane configurations comi...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1999
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.60.126005