Cascading gauge theory on dS_4 and String Theory Landscape

Abstract

Placing anti-D3 branes at the tip of the conifold in Klebanov-Strassler geometry provides a generic way of constructing meta-stable de Sitter (dS) vacua in String Theory. A local geometry of such vacua exhibit gravitational solutions with a D3 charge measured at the tip opposite to the asymptotic charge. We discuss a restrictive set of such geometries, where anti-D3 branes are smeared at the tip. Such geometries represent holographic dual of cascading gauge theory in dS4 with or without chiral symmetry breaking. We find that in the phase with unbroken chiral symmetry the D3 charge at the tip is always positive. Furthermore, this charge is zero in the phase with spontaneously broken chiral symmetry. We show that the effective potential of the chirally symmetric phase is lower than that in the symmetry broken phase, i.e, there is no spontaneous chiral symmetry breaking for cascading gauge theory in dS4. The positivity of the D3 brane charge in smooth de-Sitter deformed conifold geometries with fluxes presents difficulties in uplifting AdS vacua to dS ones in String Theory via smeared anti-D3 branes.

Figures (6)

• Figure 1: (Colour online) Comparison of values of UV parameters $\{\alpha_{1,0},a_{4,0},a_{6,0},\alpha_{8,0},g_{4,0}\}$ and IR parameters $\{a_{0}^h, b_{0}^h, K_{0}^h, g_{0}^h \}$ (see \ref{['uvirfinal']}) in the range $\delta\in[0,1]$ (blue curves) with their perturbative predictions \ref{['matchinga']}-\ref{['matching']} at first (green dotted) and second order (red dashed) in $\delta$.
• Figure 2: (Colour online) Comparison of values of select UV parameters $\{f_{a,3,0},f_{a,6,0},k_{2,3,0}\}$ of Klebanov-Strassler state obtained numerically (blue dots) with the analytic prediction (red curves), see \ref{['susyuv']}.
• Figure 3: (Colour online) Comparison of values of select IR parameters $\{K_{3,1}^h,K_{2,4}^h, K_{1,3}^h\}$ of Klebanov-Strassler state obtained numerically (blue dots) with the analytic prediction (red curves), see \ref{['susyir']}.
• Figure 4: (Colour online) Left Panel: effective potentials of the chirally symmetric ($V_{eff}^s$, red) and the broken phase ($V_{eff}^b$, blue) of the cascading gauge theory on $dS_4$. Right Panel: the difference $(V_{eff}^b- V_{eff}^s)$. The vertical lines represent the first order chiral symmetry breaking phase transitions of cascading gauge theory on $S^3$abs3 (green line) and at finite temperature abk (orange line).
• Figure 5: (Colour online) Left Panel: D3 brane charge at the tip of the conifold of the $dS_4$ deformed KT throat geometry, $Q^{D3,s}$, as a function of $\frac{H}{\Lambda}$. Right Panel: logarithm of D3 brane charge at the tip of the conifold of the $dS_4$ deformed KT throat geometry, $Q^{D3,s}$, as a function of $\frac{H}{\Lambda}$.