AbstractWe present a microscopic model of a bridge connecting two large Anti‐de‐Sitter Universes. The Universes admit a holographic description as three‐dimensional supersymmetric gauge theories based on large linear quivers, and the bridge is a small rank‐n gauge group that acts as a messenger. On the gravity side, the bridge is a piece of a highly‐curved AdS5 × S5 throat carrying n units of five‐form flux. We derive a universal expression for the mixing of the two massless gravitons: , where M is the mass splitting of the gravitons, are the effective gravitational couplings of the AdS4 Universes, and n is the quantized charge of the gate. This agrees with earlier results based on double‐trace deformations, with the important difference that the effective coupling is quantized. We argue that the apparent non‐localities of holographic double‐trace theories are resolved by integrating‐in the (scarce) degrees of freedom of the gate.