Holography for Cosmology

Details Holography for Cosmology Holography for Cosmology

2009-07-31

arxiv.org/abs/0907.5542v2

Phys.Rev.D81:021301,2010

Physics

High Energy Physics

High Energy Physics - Theory

5 pages; new figure displaying predicted spectral running.

Scientific paper

10.1103/PhysRevD.81.021301

We propose a holographic description of four-dimensional single-scalar inflationary universes, and show how cosmological observables, such as the primordial power spectrum, are encoded in the correlation functions of a three-dimensional QFT. The holographic description correctly reproduces standard inflationary predictions in the limit where a perturbative quantization of fluctuations is justified. In the opposite limit, wherein gravity is strongly coupled at early times, we propose a holographic description in terms of perturbative large N QFT. Initiating a holographic phenomenological approach, we show that models containing only two parameters, N and a dimensionful coupling constant, are capable of satisfying the current observational constraints.

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