标题： 暴胀后绝热扰动的行为和张量-标量比 显示英文标题

标题： Post-inflationary behavior of adiabatic perturbations and tensor-to-scalar ratio

摘要： 我们解释为什么在宇宙的暴胀后演化过程中，增加宇宙学张量与标量扰动比值是如此困难，甚至可能不可能。 然而，与一些最近的声明相反，在不违反现代量子场论任何规则的最简单的暴胀模型中，张量扰动可以相对较大。 显示英文摘要

摘要： We explain why it is so difficult and perhaps even impossible to increase the cosmological tensor-to-scalar perturbation ratio during the post-inflationary evolution of the universe. Nevertheless, contrary to some recent claims, tensor perturbations can be relatively large in the simplest inflationary models which do not violate any rules of modern quantum field theory.