Browsing by Subject "Flux compactifications"

Browsing by Subject "Flux compactifications"

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  • 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 ...
  • 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 ...
  • Apruzzi, Fabio; Fazzi, Marco; Rosa, Dario; Tomasiello, Alessandro (Cham : Springer, 2014)
    In M-theory, the only AdS7 supersymmetric solutions are AdS7 × S 4 and its orbifolds. In this paper, we find and classify new supersymmetric solutions of the type AdS7 × M 3 in type II supergravity. While in IIB none exist, ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...