Signatures of Planck-scale interactions in the cosmic microwave background?

Details Signatures of Planck-scale interactions in the cosmic microwave background? Signatures of Planck-scale interactions in the cosmic microwave background?

2006-01-25

arxiv.org/abs/gr-qc/0601108v1

Class.Quant.Grav.24:1375-1384,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages

Scientific paper

10.1088/0264-9381/24/6/001

Based on a rather general low-energy effective action (interacting quantum fields in classical curved space-times), we calculate potential signatures of new physics (such as quantum gravity) at ultra-high energies (presumably the Planck scale) in the anisotropies of the cosmic microwave background. These Planck-scale interactions create non-Gaussian contributions, where special emphasis is laid on the three-point function as the most promising observable, which also allows the discrimination between models violating and those obeying Lorentz invariance. PACS: 98.80.Cq, 04.62.+v, 98.70.Vc, 98.80.Qc.

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