Figure 1

The dark bubble brane in the IR and an RS brane in the UV to normalize the graviton zero mode. Owing to the ${\mathbb{Z}}_2$ symmetry across the RS brane, there is a second copy of the dark bubble on top (labeled “mirror dark bubble” and shown in gray). A string stretching between the branes along the fifth direction (shown in red) causes the branes to bend. The mirrored string is shown with a dotted blue line, and the corresponding bending is shown in gray. In the physically relevant situation discussed in the explicit realization of [22], $G_4^{\text{dark bubble}}\gg G_4^{\mathrm{RS}}$, and 4D gravity is realized on the dark bubble with the RS brane serving as a spectator.