Auflistung nach Schlagwort "Flux compactifications"

Auflistung nach Schlagwort "Flux compactifications"

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  • Accidental SUSY: Enhanced bulk supersymmetry from brane back-reaction 
    Burgess, C.P.; Van Nierop, L.; Parameswaran, Susha L.; Salvio, A.; Williams, M. (Heidelberg : Springer Verlag, 2013)
    We compute how bulk loops renormalize both bulk and brane effective interactions for codimension-two branes in 6D gauged chiral supergravity, as functions of the brane tension and brane-localized flux. We do so by explicitly ...
  • 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 ...
  • (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 geometry for string corrections 
    Coimbra, André; Minasian, Ruben; Triendl, Hagen; Waldram, Daniel (Berlin : Springer Verlag, 2014)
    We present a general formalism for incorporating the string corrections in generalised geometry, which necessitates the extension of the generalised tangent bundle. Not only are such extensions obstructed, string symmetries ...
  • 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 ...
  • Holographic fluctuations and the principle of minimal complexity 
    Chemissany, Wissam; Osborne, Tobias J. (Heidelberg : Springer Verlag, 2016)
    We discuss, from a quantum information perspective, recent proposals of Maldacena, Ryu, Takayanagi, van Raamsdonk, Swingle, and Susskind that spacetime is an emergent property of the quantum entanglement of an associated ...
  • Instantons on conical half-flat 6-manifolds 
    Bunk, Severin; Lechtenfeld, Olaf; Popov, Alexander D.; Sperling, Marcus (New York : Springer, 2015)
    We present a general procedure to construct 6-dimensional manifolds with SU(3)-structure from SU(2)-structure 5-manifolds. We thereby obtain half-flat cylinders and sine-cones over 5-manifolds with Sasaki-Einstein ...
  • Moduli stabilization and cosmology of type IIB on SU(2)-structure orientifolds 
    Caviezel, Claudio; Wrase, Timm; Zagermann, Marco (Heidelberg : Springer Verlag, 2010)
    We consider type IIB flux compactifications on six-dimensional SU(2)-structure manifolds with O5- and O7-planes. These six-dimensional spaces allow not only for F 3 and H3 fluxes but also for F 1 and F 5 fluxes. We derive ...
  • The N=4 effective action of type IIA supergravity compactified on SU(2)-structure manifolds 
    Danckaert, Thomas; Louis, Jan; Martinez-Pedrera, Danny; Spanjaard, Bastiaan; Triendl, Hagen (New York, NY : Springer International Publishing, 2011)
    We study compactifications of type IIA supergravity on six-dimensional manifolds with SU(2) structure and compute the low-energy effective action in terms of the non-trivial intrinsic torsion. The consistency with gauged ...
  • Nearly Kähler heterotic compactifications with fermion condensates 
    Chatzistavrakidis, Athanasios; Lechtenfeld, Olaf; Popov, Alexander D. (Heidelberg : Springer Verlag, 2012)
    We revisit AdS 4 heterotic compactifications on nearly Kähler manifolds in the presence of H-flux and certain fermion condensates. Unlike previous studies, we do not assume the vanishing of the supersymmetry variations. ...
  • Order α′ heterotic domain walls with warped nearly Kähler geometry 
    Haupt, Alexander S.; Lechtenfeld, Olaf; Musaev, Edvard T. (New York : Springer, 2014)
    We consider (1+3)-dimensional domain wall solutions of heterotic supergravity on a six-dimensional warped nearly Kähler manifold X 6 in the presence of gravitational and gauge instantons of tanh-kink type as constructed ...
  • 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 ...
  • 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 ...
  • Sigma models for genuinely non-geometric backgrounds 
    Chatzistavrakidis, Athanasios; Jonke, Larisa; Lechtenfeld, Olaf (New York : Springer, 2015)
    The existence of genuinely non-geometric backgrounds, i.e. ones without geometric dual, is an important question in string theory. In this paper we examine this question from a sigma model perspective. First we construct ...
  • 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 ...