Cosmological Perturbations from a New-Physics Hypersurface

Details Cosmological Perturbations from a New-Physics Hypersurface Cosmological Perturbations from a New-Physics Hypersurface

2003-02-24

arxiv.org/abs/hep-th/0302184v2

JCAP0305:001,2003

Physics

High Energy Physics

High Energy Physics - Theory

12 pages; corrected typos in the text; added two references

Scientific paper

10.1088/1475-7516/2003/05/001

Within a broad class of inflationary models we critically analyze the way initial quantum fluctuations on a new-physics hypersurface (NPH) affect standard predictions for large-scale cosmological perturbations. We find that these so-called transplanckian effects depend crucially on the definition of the "vacuum state" in particular on which Hamiltonian is minimized on the NPH in order to select such a state. Transplanckian effects can be made much smaller than previously suggested if sufficiently "adiabatic" Hamiltonians are minimized.

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