Auflistung nach Schlagwort "Superstring Vacua"

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  • All AdS(7) solutions of type II supergravity 
    Apruzzi, Fabio; Fazzi, Marco; Rosa, Dario; Tomasiello, Alessandro (New York, NY : Springer International Publishing, 2014)
    In M-theory, the only AdS(7) supersymmetric solutions are AdS(7) x S-4 and its orbifolds. In this paper, we find and classify new supersymmetric solutions of the type AdS(7) x M-3 in type II supergravity. While in IIB none ...
  • All complete intersection Calabi-Yau four-folds 
    Gray, James; Haupt, Alexander S.; Lukas, Andre (New York, NY : Springer International Publishing, 2013)
    We present an exhaustive, constructive, classification of the Calabi-Yau four-folds which can be described as complete intersections in products of projective spaces. A comprehensive list of 921,497 configuration matrices ...
  • (Anti-)brane backreaction beyond perturbation theory 
    Bläbäck, Johan; Danielsson, Ulf H.; Junghans, Daniel; Van Riet, Thomas; Wrase, Timm; Zagermann, Marco (Heidelberg : Springer Verlag, 2012)
    We improve on the understanding of the backreaction of anti-D6-branes in a ux background that is mutually BPS with D6-branes. This setup is analogous to the study of the backreaction of anti-D3-branes inserted in the KS ...
  • Cosmological constant, near brane behavior and singularities 
    Gautason, Fridrik Freyr; Junghans, Daniel; Zagermann, Marco (New York, NY : Springer International Publishing, 2013)
    We show that the classical cosmological constant in type II flux compactifications can be written as a sum of terms from the action of localized sources plus a specific contribution from non-trivial background fluxes. ...
  • Generalised structures for N=1 AdS backgrounds 
    Coimbra, André; Strickland-Constable, Charles (New York, NY : Springer International Publishing, 2016)
    We expand upon a claim made in a recent paper [arXiv: 1411.5721] that generic minimally supersymmetric AdS backgrounds of warped flux compactifications of Type II and M theory can be understood as satisfying a straightforward ...
  • Heterotic compactifications on nearly Kahler manifolds 
    Lechtenfeld, Olaf; Noelle, Christoph; Popov, Alexander D. (New York, NY : Springer International Publishing, 2010)
    We consider compactifications of heterotic supergravity on anti-de Sitter space, with a six-dimensional nearly Kahler manifold as the internal space. Completing the model proposed by Frey and Lippert [10] with the particular ...
  • Heterotic G(2)-manifold compactifications with fluxes and fermionic condensates 
    Gemmer, Karl-Philip; Lechtenfeld, Olaf (New York, NY : Springer International Publishing, 2013)
    We consider flux compactifications of heterotic string theory in the presence of fermionic condensates on M-1,M-2 x X-7 with both factors carrying a Killing spinor. In other words, M-1,M-2 is either de Sitter, anti-de ...
  • The problematic backreaction of SUSY-breaking branes 
    Blaback, Johan; Danielsson, Ulf H.; Junghans, Daniel; Van Riet, Thomas; Wrase, Timm; Zagermann, Marco (New York, NY : Springer International Publishing, 2011)
    In this paper we investigate the localisation of SUSY-breaking branes which, in the smeared approximation, support specific non-BPS vacua. We show, for a wide class of boundary conditions, that there is no flux vacuum when ...
  • Quantum corrections in string compactifications on SU(3) structure geometries 
    Graña, Mariana; Louis, Jan; Theis, Ulrich; Waldram, Daniel (New York : Springer, 2015)
    We investigate quantum corrections to the classical four-dimensional low-energy effective action of type II string theory compactified on SU(3) structure geometries. Various methods previously developed for Calabi-Yau ...
  • Smeared versus localised sources in flux compactifications 
    Blaback, Johan; Danielsson, Ulf H.; Junghans, Daniel; Van Riet, Thomas; Wrase, Timm; Zagermann, Marco (New York, NY : Springer International Publishing, 2010)
    We investigate whether vacuum solutions in flux compactifications that are obtained with smeared sources (orientifolds or D-branes) still survive when the sources are localised. This seems to rely on whether the solutions ...
  • Supersymmetric AdS 7 and AdS 6 vacua and their consistent truncations with vector multiplets 
    Malek, E.; Samtleben, H.; Camell, V.V. (Heidelberg : Springer Verlag, 2019)
    Using exceptional field theory we construct supersymmetric warped AdS 7 vacua of massive IIA and AdS 6 vacua of IIB, as well as their consistent truncations including vector multiplets. We show that there are no consistent ...
  • Topological invariants and fibration structure of complete intersection Calabi-Yau four-folds 
    Gray, James; Haupt, Alexander S.; Lukas, Andre (New York : Springer, 2014)
    We investigate the mathematical properties of the class of Calabi-Yau four-folds recently found in ref. [1]. This class consists of 921,497 configuration matrices which correspond to manifolds that are described as complete ...
  • A universal tachyon in nearly no-scale de Sitter compactifications 
    Junghans, Daniel; Zagermann, Marco (Heidelberg : Springer Verlag, 2018)
    We investigate de Sitter solutions of N= 1 supergravity with an F-term scalar potential near a no-scale Minkowski point, as they may in particular arise from flux compactifications in string theory. We show that a large ...
  • Wilson lines and Chern-Simons flux in explicit heterotic Calabi-Yau compactifications 
    Apruzzi, Fabio; Gautason, Fridrik Freyr; Parameswaran, Susha L.; Zagermann, Marco (New York : Springer, 2015)
    We study to what extent Wilson lines in heterotic Calabi-Yau compactifications lead to non-trivial H-flux via Chern-Simons terms. Wilson lines are basic ingredients for Standard Model constructions but their induced H-flux ...