  We sketch the construction of a quantum model of 3 dimensional de Sitter
space, based on the Covariant Entropy Principle and the observation that
semi-classical physics suggests the possibility of a consistent theory of a
finite number of unstable massive particles with purely gravitational
interactions. Our model is holographic, finite, unitary, causal, plausibly
exhibits fast scrambling, and qualitatively reproduces features of
semi-classical de Sitter physics. In an appendix we outline some calculations
that might lead to further tests of the model.
