论文标题
慢速通货膨胀的局部宇宙学扩展上的重力反应
Graviton backreaction on the local cosmological expansion in slow-roll inflation
论文作者
论文摘要
我们将重力一环校正计算为在慢速通胀中局部膨胀率的预期值，这两个慢速参数有限。该计算基于一种在扰动理论中所有阶的扰动量子重力中明确构建规格不变的可观察力的方法，并且在高度对称的时空背景的情况下特别适合。我们的分析增加了对DE Sitter时空和单场通货膨胀中这种校正的最新计算，并持续减速。在前一种情况下，发现了消失的一环校正，而在后者中，量子反应产生了世俗的效应，从而加速了膨胀。我们在这里描述的量子校正会产生有限的世俗效应，可以根据慢速参数的值加速或减速背景扩展。
We compute the graviton one-loop correction to the expectation value of the local expansion rate in slow-roll inflation, with both slow-roll parameters finite. The calculation is based on a recent method to explicitly construct gauge-invariant observables in perturbative quantum gravity at all orders in perturbation theory, and it is particularly suited in cases of highly-symmetrical space-time backgrounds. Our analysis adds to recent calculations of that correction in de Sitter space-time and in single-field inflation with constant deceleration. In the former case a vanishing one-loop correction was found, while in the latter the quantum backreaction produces a secular effect that accelerates the expansion. The quantum correction we describe here produces a finite secular effect that can either accelerated or decelerate the background expansion, depending on the value of the slow-roll parameters.
