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14
Fourdimensional String Compactifications with DBranes, Orientifolds and Fluxes
"... This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with Dbranes and fluxes. The main concern is to provide all necessary technical tools to explicitly construct fourdimensional orientifold vacua, with the final aim to ..."
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Cited by 147 (18 self)
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This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with Dbranes and fluxes. The main concern is to provide all necessary technical tools to explicitly construct fourdimensional orientifold vacua, with the final aim to come as close as possible to the supersymmetric Standard Model. Furthermore, we outline the available methods to derive the resulting fourdimensional effective action. Finally, we summarize recent attempts to address the
Local heterotic torsional models
"... We present a class of smooth supersymmetric heterotic solutions with a noncompact EguchiHanson space. The noncompact geometry is embedded as the base of a sixdimensional nonKähler manifold with a nontrivial torus fiber. We solve the nonlinear anomaly equation in this background exactly. We als ..."
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Cited by 13 (5 self)
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We present a class of smooth supersymmetric heterotic solutions with a noncompact EguchiHanson space. The noncompact geometry is embedded as the base of a sixdimensional nonKähler manifold with a nontrivial torus fiber. We solve the nonlinear anomaly equation in this background exactly. We also define a new charge that detects the nonKählerity of our solutions. June
NonKaehler Heterotic String Compactifications with nonzero fluxes and constant dilaton
, 2008
"... We construct new explicit compact valid solutions with nonzero field strength and constant dilaton to the heterotic string equations in dimension six. We present balanced Hermitian structures on compact nilmanifolds in dimension six satisfying the heterotic supersymmetry equations with nonzero f ..."
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Cited by 7 (3 self)
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We construct new explicit compact valid solutions with nonzero field strength and constant dilaton to the heterotic string equations in dimension six. We present balanced Hermitian structures on compact nilmanifolds in dimension six satisfying the heterotic supersymmetry equations with nonzero flux and constant dilaton which obey the threeform Bianchi identity with curvature term taken with respect to either the LeviCivita, the (+)connection or the Chern connection.
Linear Sigma Models with Torsion
 JHEP 1111 (2011) 034, arXiv:1107.0714 [hepth
"... Gauged linear sigma models with (0, 2) supersymmetry allow a larger choice of couplings than models with (2, 2) supersymmetry. We use this freedom to find a fully linear construction of torsional heterotic compactifications, including models with branes. As a noncompact example, we describe a famil ..."
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Cited by 6 (1 self)
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Gauged linear sigma models with (0, 2) supersymmetry allow a larger choice of couplings than models with (2, 2) supersymmetry. We use this freedom to find a fully linear construction of torsional heterotic compactifications, including models with branes. As a noncompact example, we describe a family of metrics which correspond to deformations of the heterotic conifold by turning on Hflux. We then describe compact models which are gaugeinvariant only at the quantum level. Our construction gives a generalization of symplectic reduction. The resulting spaces are nonKähler analogues of familiar toric spaces like complex projective space. Perturbatively conformal models can be constructed by considering intersections.
Flux backgrounds from Twist duality
, 2009
"... It is well known that a constant O(n,n, Z) transformation can relate different string backgrounds with n commuting isometries that have very different geometric and topological properties. Here we generalize this transformation by making the O(n,n) transformation coordinate dependent and construct d ..."
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Cited by 5 (0 self)
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It is well known that a constant O(n,n, Z) transformation can relate different string backgrounds with n commuting isometries that have very different geometric and topological properties. Here we generalize this transformation by making the O(n,n) transformation coordinate dependent and construct discrete families of (flux) backgrounds on internal manifolds of different topologies. Our two principal examples include respectively the family of type IIB compactifications with D5 branes and O5 planes on sixdimensional nilmanifolds, and the heterotic torsional backgrounds.