论文标题
$λ_3中的重力波相互作用
Gravitational wave interactions in $Λ_3$ models of dark energy
论文作者
论文摘要
我们认为，两个标量重力和一个张量重力之间的立方顺序相互作用在暗能模型中无处不在，其中强耦合量表为$λ_3$。这些相互作用可以潜在地为重力波提供有效的衰减通道。它们还可以导致标量扰动的梯度不稳定性，在存在大幅度重力波的情况下，例如Ligo/处女座检测到的人。与标量调整理论中的模型相反，通用$λ_3$模型中存在无限数量的高阶相互作用，这使得很难预测从立方顺序相互作用中推断出的这些不稳定性的命运。
We argue that cubic order interactions between two scalar gravitons and one tensor graviton are ubiquitous in models of dark energy where the strong coupling scale is $Λ_3$. These interactions can potentially provide efficient decay channels for gravitational waves. They can also lead to gradient instabilities of the scalar perturbations in the presence of large amplitude gravitational waves, e.g. those detected by LIGO/Virgo. In contrast with models in scalar-tensor theories, there is an infinite number of higher order interactions in generic $Λ_3$ models, which make it difficult to predict the fate of these instabilities inferred from cubic order interactions.
