The graviton propagator for Minkowski space in general relativity is G α α β β μ μ ν ν = P α α β β μ μ ν ν 2 k 2 − − P s 0 α α β β μ μ ν ν 2 k 2 = g α α μ μ g β β ν ν + g β β μ μ g α α ν ν − − 2 D − − 2 g μ μ ν ν g α α β β k 2 , where D is the number of spacetime dimensions, P 2 is the transverse and traceless spin-2 projection operator and P s 0 is a spin-0 scalar multiplet. The graviton propagator for (Anti) de Sitter space is G = P 2 2 H 2 − − ◻ ◻ + P s 0 2 ( ◻ ◻ + 4 H 2 ) , where H is the Hubble constant. Note that upon taking the limit H → → 0 and ◻ ◻ → → − − k 2 , the AdS propagator reduces to the Minkowski propagator.