论文标题
追踪高能量的重力理论：Palatini通货膨胀介绍
Tracing the high energy theory of gravity: an introduction to Palatini inflation
论文作者
论文摘要
我们在Palatini Gravity的背景下介绍了宇宙通胀的介绍，这是通常的重力度量理论的有趣替代方法。在后一种情况下，只有度量$ g_ {μν} $确定时空的几何形状，而在前一种情况下，公制和时空连接$γ^λ_ /μν} $都是先前的自变量 - 可以导致与公制的理论的选择。在负责宇宙膨胀的领域与重力或重力部门偶联的情况下，否则将扩展到重力部门，对基本的重力自由度的假设可能会对膨胀的观察结果产生重大影响。我们通过审查包括希格斯通货膨胀，$ r^2 $通货膨胀和$ξ$ -ATTRACTOR模型在内的几种有趣且动机的情况来明确证明这一点。我们还讨论了未来研究的一些前景，并争论为什么$ r = 10^{ - 3} $是未来寻找原始引力浪潮签名的未来任务的特别重要目标。
We present an introduction to cosmic inflation in the context of Palatini gravity, which is an interesting alternative to the usual metric theory of gravity. In the latter case only the metric $g_{μν}$ determines the geometry of space-time, whereas in the former case both the metric and the space-time connection $Γ^λ_{μν}$ are a priori independent variables - a choice which can lead to a theory of gravity different from the metric one. In scenarios where the field(s) responsible for cosmic inflation are coupled non-minimally to gravity or the gravitational sector is otherwise extended, assumptions of the underlying gravitational degrees of freedom can have a big impact on the observational consequences of inflation. We demonstrate this explicitly by reviewing several interesting and well-motivated scenarios including Higgs inflation, $R^2$ inflation, and $ξ$-attractor models. We also discuss some prospects for future research and argue why $r=10^{-3}$ is a particularly important goal for future missions that search for signatures of primordial gravitational waves.
