Probing the Gravitational Wave Signature from Cosmic Phase Transitions at Different Scales

Details Probing the Gravitational Wave Signature from Cosmic Phase Transitions at Different Scales Probing the Gravitational Wave Signature from Cosmic Phase Transitions at Different Scales

2010-03-08

arxiv.org/abs/1003.1735v3

PhysRevD.82.044001 (2010)

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, Phys. Rev D version (revised in response to referee's comments)

Scientific paper

We present a new signature by which to one could potentially discriminate between a spectrum of gravitational radiation generated by a self-ordering scalar field vs that of inflation, specifically a comparison of the magnitude of a flat spectrum at frequencies probed by future direct detection experiments to the magnitude of a possible polarization signal in the Cosmic Microwave Background (CMB) radiation. In the process we clarify several issues related to the proper calculation of such modes, focusing on the effect of post-horizon-crossing evolution.

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