标题： 来自新物理超曲面的宇宙学扰动 显示英文标题

标题： Cosmological Perturbations from a New-Physics Hypersurface

摘要： 在一类广义的暴胀模型中，我们批判性地分析了新物理超曲面上的初始量子涨落（NPH）如何影响对大尺度宇宙扰动的标准预测。 我们发现这些所谓的普朗克尺度以上效应在很大程度上取决于“真空态”的定义，特别是取决于在NPH上哪一种哈密顿量被最小化以选择这种状态。 如果最小化足够“绝热”的哈密顿量，普朗克尺度以上效应可以比之前建议的要小得多。 显示英文摘要

摘要： 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.