论文标题
渐近安全范式中的移位对称Horndeski重力
Shift-symmetric Horndeski gravity in the asymptotic-safety paradigm
论文作者
论文摘要
Horndeski Gravity是动态暗能量现象学模型的流行竞争者，也是观察性约束。在这项工作中，我们询问Horndeski重力是否可以不仅仅是现象学模型，而是成为一种基本理论，该理论延伸到高能量尺度并包括量子效应。我们发现，在渐近安全范式中，可以实现一类简单的Horndeski重力模型的紫外线完成，但在理论的耦合上施加了强烈的约束。这些约束与动态暗能量不兼容。此外，我们在对这类Horndeski重力模型的有效场理论方法中发现了类似的结果：在假设没有新的紧密耦合物理学以下的新型物理学以下，量子重力波动迫使Horndeski耦合太小，无法实现动态暗能量的解释。
Horndeski gravity is a popular contender for a phenomenological model of dynamical dark energy, and as such subject to observational constraints. In this work, we ask whether Horndeski gravity can be more than a phenomenological model and instead become a fundamental theory, which extends towards high energy scales and includes quantum effects. We find that within the asymptotic-safety paradigm, an ultraviolet completion of a simple class of models of Horndeski gravity is achievable, but places strong constraints on the couplings of the theory. These constraints are not compatible with dynamical dark energy. Further, we find a similar result in an effective-field theory approach to this class of models of Horndeski gravity: under the assumption that there is no new strongly-coupled physics below the Planck scale, quantum gravity fluctuations force the Horndeski couplings to be too small to achieve an explanation of dynamical dark energy.
