论文标题
从轴支弱重力猜想对早期暗能的限制
Constraints on Early Dark Energy from the Axion Weak Gravity Conjecture
论文作者
论文摘要
解决哈勃张力的流行建议涉及黑暗能量的早期阶段，该阶段是由具有周期性潜力的轴心场驱动的。在本文中，我们认为这些模型受轴突弱重力构想的严格约束：对于典型的参数值，轴衰变常数必须满足$ f <0.008 m _ {\ textrm {pl}} $，该轴是比轴衰变常数小于早期的黑暗能量模型，该轴衰变常数是斧头衰减常数。我们讨论了逃避或放松这一约束的可能方法，认为其漏洞很小且难以穿线。这表明在紫外线完整的量子重力理论中实现早期的黑能模型可能会很具有挑战性。
A popular proposal for resolving the Hubble tension involves an early phase of dark energy, driven by an axion field with a periodic potential. In this paper, we argue that these models are tightly constrained by the axion weak gravity conjecture: for typical parameter values, the axion decay constant must satisfy $f < 0.008 M_{\textrm{Pl}}$, which is smaller than the axion decay constants appearing in the vast majority of early dark energy models to date. We discuss possible ways to evade or loosen this constraint, arguing that its loopholes are small and difficult to thread. This suggests that it may prove challenging to realize early dark energy models in a UV complete theory of quantum gravity.
