Smeared versus localised sources in flux compactifications

124

Abstract: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-brane interaction is repulsive, which implies that anti-D3 branes are tachyonic. Hence, even though anti-D3 branes can polarize into five-branes, the solution will most likely be unstable. This indicates that anti-D3 brane uplift may not result in stable de Sitter vacua.

Section: Jhep02(2015)146mentioning

confidence: 65%

Giant tachyons in the landscape

Bena

Graña

Kuperstein

et al. 2015

124

“…However, other works pointed out problems in the full solution for antibranes in ISD flux backgrounds [26,27].…”

Section: Charges and Anti-m2 Branesmentioning

confidence: 99%

Metastable vacua and the backreacted Stenzel geometry

Massai

2012

Abstract:We construct an M-theory background dual to the metastable state recently discussed by Klebanov and Pufu, which corresponds to placing a stack of anti-M2 branes at the tip of a warped Stenzel space. With this purpose we analytically solve for the linearized non-supersymmetric deformations around the warped Stenzel space, preserving the SO(5) symmetries of the supersymmetric background, and which interpolate between the IR and UV region. We identify the supergravity solution which corresponds to a stack ofN backreacting anti-M2 branes by fixing all the 12 integration constants in terms ofN . While in the UV this solution has the desired features to describe the conjectured metastable state of the dual (2+1)-dimensional theory, in the IR it suffers from a singularity in the four-form flux, which we describe in some details.

“…The reason is that the flux is attracted gravitationally and electromagnetically towards the antibranes. If the antibranes are replaced instead with branes, the electromagnetic repulsion will exactly counterbalance the gravitational pull [34]. This entails an obvious instability since a clumping of fluxes carrying Dk charges will enhance the brane-flux annihilation.…”

Section: Jhep03(2017)141 2 Backreaction Effects and Instabilitiesmentioning

confidence: 99%

“…If one allows the D6 worldvolume to be AdS 7 instead of Mink 7 the space transversal to the brane can be made compact and conformal to S 3 [34]. The resulting solution was described qualitatively in [18,33].…”

Section: Warped Ads 7 With D6 Branesmentioning

confidence: 99%

Unstoppable brane-flux decay of D 6 ¯ $$ \overline{\mathrm{D}6} $$ branes

Danielsson

Gautason

Riet

2017

We investigate p D6 branes inside a flux throat that carries K × M D6 charges with K the 3-form flux quantum and M the Romans mass. In such a setup brane-flux annihilation can proceed through the nucleation of KK5 branes. We find that within the calculable supergravity regime where g s p is large, the D6 branes annihilate immediately against the fluxes despite the existence of a metastable state at small p/M in the probe approximation. The crucial property that causes this naive conflict with effective field theory is a singularity in the 3-form flux, which we cut off at string scale. Our result explains the absence of regular solutions at finite temperature and suggests there should be a smooth time-dependent solution. We also discuss the qualitative differences between D6 branes and D3 branes, which makes it a priori not obvious to conclude the same instability for D3 branes.