标题： 引力引起的真空优势 显示英文标题

标题： Gravity-induced vacuum dominance

摘要： 长期以来，人们普遍认为，除了非常极端的情况外，引力对量子场的影响应该只是微小的、次主导性的贡献。 这一观点似乎得到了过去几十年在弯曲时空量子场重整化背景下所取得的开创性成果的支持。 然而，本文作者认为这种信念是错误的，因为通过展示存在一些表现良好的时空演化情况，在这些情况下，自由量子场的真空能量密度由于背景时空本身的作用，被迫变得比任何经典的能量密度成分都更占主导地位。 这种半经典引力效应可以追溯到曲率时空下场的红外行为。 通过估算真空能量密度成为主导的时间尺度，因此背景时空上的反作用变得重要，我们提出这种真空主导性可能带来意想不到的天体物理和宇宙学意义。 显示英文摘要

摘要： It has been widely believed that, except in very extreme situations, the influence of gravity on quantum fields should amount to just small, sub-dominant contributions. This view seemed to be endorsed by the seminal results obtained over the last decades in the context of renormalization of quantum fields in curved spacetimes. Here, however, we argue that this belief is false by showing that there exist well-behaved spacetime evolutions where the vacuum energy density of free quantum fields is forced, by the very same background spacetime, to become dominant over any classical energy-density component. This semiclassical gravity effect finds its roots in the infrared behavior of fields on curved spacetimes. By estimating the time scale for the vacuum energy density to become dominant, and therefore for backreaction on the background spacetime to become important, we argue that this vacuum dominance may bear unexpected astrophysical and cosmological implications.