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14 papers found.
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A deformed conifold with a cosmological constant

We find a new regular solution of six-dimensional Einstein’s equations with a positive cosmological constant. It has the same isometry group as the (deformed) conifold geometry, and the superpotential approach is used to solve the equations of motion. The space is compact and interpolates between the deformed conifold and the resolved cone with a blown-up four cycle. The...

Brane polarization is no cure for tachyons

Anti-M2 and anti-D3 branes placed in regions with charges dissolved in fluxes have a tachyon in their near-horizon region, which causes these branes to repel each other. If the branes are on the Coulomb branch this tachyon gives rise to a runaway behavior, but when the branes are polarized into five-branes this tachyon only appears to lower the energy of the polarized branes...

Fermionic and bosonic mass deformations of \( \mathcal{N} \) = 4 SYM and their bulk supergravity dual

We examine the AdS-CFT dual of arbitrary (non)supersymmetric fermionic mass deformations of \( \mathcal{N} \) = 4 SYM, and investigate how the backreaction of the RR and NS-NS two-form potentials dual to the fermion masses contribute to Coulomb-branch potential of D3 branes, which we interpret as the bulk boson mass matrix. Using representation theory and supergravity arguments...

Non-SUSY fractional branes

We consider a simplified Ansatz for supergravity solutions describing fractional p-brane solutions (throat geometries supported by fluxes) for various p. For p = 3 the Ansatz captures the Klebanov-Tseytlin (KT) solution. The equations of motion can be derived from an effective action by performing a dimensional reduction to a flat domain wall geometry in p + 2 dimensions. We find...

Spacetime emergence via holographic RG flow from incompressible Navier-Stokes at the horizon

We show that holographic RG flow can be defined precisely such that it corresponds to emergence of spacetime. We consider the case of pure Einstein’s gravity with a negative cosmological constant in the dual hydrodynamic regime. The holographic RG flow is a system of first order differential equations for radial evolution of the energy-momentum tensor and the variables which...

Giant tachyons in the landscape

We study the dynamics of localized and fully backreacting anti-D3 branes at the tip of the Klebanov-Strassler geometry. We use a non-supersymmetric version of the Polchinski-Strassler analysis to compute the potential for anti-D3 branes to polarize into all kinds of five-brane shells in all possible directions. We find that generically there is a direction along which the brane...

Non-supersymmetric conifold

Anatoly Dymarsky dymarsky@ias.edu 1 Stanislav Kuperstein stanislav.kuperstein@cea.fr 0 0 Institut de Physique Tehorique , CEA Saclay, CNRS-URA 2306, 91191 Gif sur Yvette, France 1 School of Natural

On spontaneous breaking of conformal symmetry by probe flavour D-branes

We explore the possibilities of breaking conformal symmetry spontaneously by introducing flavour branes into conformal holographic backgrounds in the probe limit. A prototype model of such a mechanism is based on placing \( D7-\overline{D}7 \) configuration in the Klebanov-Witten conifold based model. In this paper we generalize this model. We conjecture on the required topology...

The unconditional RG flow of the relativistic holographic fluid

Stanislav Kuperstein 0 Ayan Mukhopadhyay 0 Open Access 0 0 Laboratoire de Physique Theorique et Hautes Energies (LPTHE), Universite Pierre et Marie Curie Paris 6 , CNRS UMR 7589, Tour 13-14, 4 We

Tachyonic anti-M2 branes

We study the dynamics of anti-M2 branes in a warped Stenzel solution with M2 charges dissolved in fluxes by taking into account their full backreaction on the geometry. The resulting supergravity solution has a singular magnetic four-form flux in the near-brane region. We examine the possible resolution of this singularity via the polarization of anti-M2 branes into M5 branes...

Stringy effects in black hole decay

Stanislav Kuperstein 0 Sameer Murthy 0 0 Laboratoire de Physique Theorique et Hautes Energies (LPTHE) Universite Pierre et Marie Curie - Paris 6 ; CNRS UMR 7589, Tour 13-14, 4 We compute the low

Polchinski-Strassler does not uplift Klebanov-Strassler

Anti-D3-branes at the tip of the Klebanov-Strassler solution with D3-charge dissolved in fluxes give rise, in the probe approximation, to a metastable state. The fully back-reacted smeared solution has singular three-form fluxes in the IR, whose presence suggests a stringy resolution by brane polarization à la Polchinski-Strassler. In this paper we show that there is no...

On vector meson masses in a holographic SQCD

We study probe flavor branes supersymmetrically embedded in the Klebanov-Strassler background. The embedding is controlled by a single complex parameter μ related to the quark mass. We study the spectrum of the vector mesons as a function of μ and compare it with the experimental data. Assuming that the ρ(2150) meson is a 3 3 S 1 mode we find a remarkable agreement with the...

Persistent anti-brane singularities

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 linearized approximation or includes the effects of brane polarization. In this paper we consider anti-D6 branes, whose singularities have been shown to exist at...