Gravity Waves from Instantons

Details Gravity Waves from Instantons Gravity Waves from Instantons

1999-03-03

arxiv.org/abs/astro-ph/9903075v1

Phys.Rev. D62 (2000) 083514

Astronomy and Astrophysics

Astrophysics

19 pages, RevTex file, including two postscript figure files

Scientific paper

10.1103/PhysRevD.62.083514

We perform a first principles computation of the spectrum of gravity waves produced in open inflationary universes. The background spacetime is taken to be the continuation of an instanton saddle point of the Euclidean no boundary path integral. The two-point tensor correlator is computed directly from the path integral and is shown to be unique and well behaved in the infrared. We discuss the tensor contribution to the cosmic microwave background anisotropy and show how it may provide an observational discriminant between different types of primordial instantons.

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