G. L. Cardoso

Publications (8)6.99 Total impact

• Source

  Available from: arxiv.org

  Article: On subextensive corrections to fluid dynamics from gravity

  G. L. Cardoso, G. Dall’Agata, V. Grass
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  ABSTRACT: We use the fluid-gravity correspondence to compute subextensive corrections, proportional to the shear tensor, to the energy-momentum tensor of fluids on three-spheres. The dual configurations we consider are charged black hole solutions of N = 2 gauged supergravity theories in five dimensions. KeywordsGauge-gravity correspondence-Black Holes in String Theory-AdS-CFT Correspondence
  Journal of High Energy Physics 04/2012; 2010(4):1-27. · 5.83 Impact Factor
• Source

  Available from: ArXiv

  Article: On Subextensive Corrections to Fluid Dynamics from Gravity

  G. L. Cardoso, G. Dall'Agata, V. Grass
  [show abstract] [hide abstract]
  ABSTRACT: We use the fluid-gravity correspondence to compute subextensive corrections, proportional to the shear tensor, to the energy-momentum tensor of fluids on three-spheres. The dual configurations we consider are charged black hole solutions of N = 2 gauged supergravity theories in five dimensions.
  06/2009;
• Source

  Available from: ArXiv

  Article: On five-dimensional non-extremal charged black holes and FRW cosmology

  G. L. Cardoso, V. Grass
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  ABSTRACT: We consider static non-extremal charged black hole solutions in the context of N=2 gauged supergravity theories in five dimensions, and we show that they satisfy first-order flow equations. Then we analyze the motion of the dual brane in these black hole backgrounds. We express the entropy in terms of a Cardy-Verlinde-type formula, and we show that the equations describing the FRW cosmology on the brane have a form that is similar to the equations for the entropy and for the Casimir energy on the brane. We also briefly comment on the inclusion of a Gauss-Bonnet term in the analysis.
  04/2008;
• Source

  Available from: arxiv.org

  Article: Heterotic string theory on non‐Kähler manifolds with H‐flux and Gaugino condensate

  G.L. Cardoso, G. Curio, G. Dall'Agata, D. Lüst
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  ABSTRACT: We discuss compactifications of heterotic string theory to four dimensions in the presence of H–fluxes, which deform the geometry of the internal manifold, and a gaugino condensate which breaks supersymmetry. We focus on the compensation of the two effects in order to obtain vacua with zero cosmological constant and we comment on the effective superpotential describing these vacua.
  Fortschritte der Physik 05/2004; 52(6‐7):483 - 488. · 1.16 Impact Factor
• Source

  Available from: arxiv.org

  Article: Non-Kaehler String Backgrounds and their Five Torsion Classes

  G. L. Cardoso, G. Curio, G. Dall'Agata, D. Lust, P. Manousselis, G. Zoupanos
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  ABSTRACT: We discuss the mathematical properties of six--dimensional non--K\"ahler manifolds which occur in the context of ${\cal N}=1$ supersymmetric heterotic and type IIA string compactifications with non--vanishing background H--field. The intrinsic torsion of the associated SU(3) structures falls into five different classes. For heterotic compactifications we present an explicit dictionary between the supersymmetry conditions and these five torsion classes. We show that the non--Ricci flat Iwasawa manifold solves the supersymmetry conditions with non--zero H--field, so that it is a consistent heterotic supersymmetric groundstate. Comment: 33 pages, LaTeX; references added; one more reference added
  11/2002;
• Article: On Subextensive Corrections to Fluid Dynamics from Gravity

  G. L. Cardoso, G. Agata, V. Grass
  [show abstract] [hide abstract]
  ABSTRACT: We use the fluid-gravity correspondence to compute subextensive corrections, proportional to the shear tensor, to the energy-momentum tensor of fluids on three-spheres. The dual configurations we consider are charged black hole solutions of N = 2 gauged supergravity theories in five dimensions.
  Journal of High Energy Physics, 064 (2010).
• Article: Gaugino Condensation and Generation of Supersymmetric 3-Form Flux

  G. L. Cardoso, G. Curio, G. Agata, D. Lust
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  ABSTRACT: We extend the linearised solution of Polchinski and Strassler describing the supergravity dual of the N=1* gauge theory. By analysing the equations of motion of type IIB supergravity at cubic order in the mass perturbation parameter, we demonstrate the emergence of a 3-form flux of type (3,0) with respect to the natural complex structure. The generation of this flux can be associated to the dynamical formation of a gaugino condensate in the confining phase of the N=1* gauge theory. We also check that the supersymmetry conditions are satisfied, and we discuss how this (3,0)-form flux is tied to the existence of a supersymmetric background with SU(2)-structure.
  Journal of High Energy Physics, 059 (2004).
• Article: On five-dimensional non-extremal charged black holes and FRW cosmology

  G.L. Cardoso, V. Grass
  [show abstract] [hide abstract]
  ABSTRACT: We consider static non-extremal charged black hole solutions in the context of N=2 gauged supergravity theories in five dimensions, and we show that they satisfy first-order flow equations. Then we analyze the motion of the dual brane in these black hole backgrounds. We express the entropy in terms of a Cardy–Verlinde-type formula, and we show that the equations describing the FRW cosmology on the brane have a form that is similar to the equations for the entropy and for the Casimir energy on the brane. We also briefly comment on the inclusion of a Gauss–Bonnet term in the analysis.
  Nuclear Physics B.