Auflistung nach Schlagwort "D-branes"

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  • (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 ...
  • Boundary conformal field theory analysis of the H3+ model 
    Adorf, Hendrik (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2008)
    [no abstract]
  • The cosmological constant, branes and non-geometry 
    Gautason, Fridrik Freyr (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2014)
    [no abstract]
  • 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. ...
  • D-brane scattering of N=2 strings 
    Jünemann, Klaus; Spendig, Bernd (Amsterdam : Elsevier, 2001)
    The amplitudes for emission and scattering of N = 2 strings off D-branes are calculated. We consider in detail the amplitudes <cc> and <occ> for the different types of D-branes. For some D-branes we find massive poles in ...
  • Der N=2 String auf nicht trivialen Hintergründen 
    Spendig, Bernd (Hannover : Universität, 2002)
    [no abstract]
  • Persistent anti-brane singularities 
    Bena, Iosif; Junghans, Daniel; Kuperstein, Stanislav; Van Riet, Thomas; Wrase, Timm; Zagermann, Marco (Heidelberg : Springer Verlag, 2012)
    Anti-D-branes inserted in warped throat geometries (supported by fluxes that carry D-brane charges) develop unphysical singularities.It has been argued that these singularities could be resolved when one goes beyond the ...
  • 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 ...
  • 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 ...
  • String field theory : methods and solutions 
    Uhlmann, Sebastian (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2003)
    [no abstract]
  • Supersymmetric AdS(5) solutions of massive IIA supergravity 
    Apruzzi, Fabio; Fazzi, Marco; Passias, Achilleas; Tomasiello, Alessandro (New York, NY : Springer International Publishing, 2015)
    Motivated by a recently found class of AdS(7) solutions, we classify AdS(5) solutions in massive IIA, finding infinitely many new analytical examples. We reduce the general problem to a set of PDEs, determining the local ...