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Cosmological Perturbations from a New-Physics Hypersurface

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arxiv hep-th/0302184 v2 pith:Q7NJXXIT submitted 2003-02-24 hep-th gr-qchep-ph

V. Bozza , M. Giovannini , G. Veneziano This is my paper · ORCID
classification hep-thgr-qchep-ph
keywords cosmologicaleffectshypersurfaceminimizednew-physicsperturbationsstatetransplanckian
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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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