  We propose a holographic map between Einstein gravity coupled to matter in a
de Sitter background and large N quantum mechanics of a system of spins.
Holography maps a spin model with a finite dimensional Hilbert space defined on
a version of the stretched horizon into bulk gravitational dynamics. The full
Hamiltonian of the spin model contains a non-local piece which generates
chaotic dynamics, widely conjectured to be a necessary part of quantum gravity,
and a local piece which recovers the perturbative spectrum in the bulk.
