de Sitter invariance of the dS graviton vacuum

Details de Sitter invariance of the dS graviton vacuum de Sitter invariance of the dS graviton vacuum

2011-07-14

arxiv.org/abs/1107.2712v2

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 1 figure

Scientific paper

The two-point function of linearized gravitons on de Sitter space is infrared divergent in the standard transverse traceless synchronous gauge defined by $k=0$ cosmological coordinates (also called conformal or Poincare coordinates). We show that this divergence can be removed by adding a linearized diffeomorphism to each mode function; i.e., by an explicit change of gauge. It follows that the graviton vacuum state is well-defined and de Sitter invariant in agreement with various earlier arguments.

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