论文标题
在弦理论中迈向早期的黑暗能量
Towards Early Dark Energy in String Theory
论文作者
论文摘要
早期的暗能量（EDE）是解决哈勃张力的突出模型，该模型采用具有周期性电势的动力轴承。在这项工作中，我们迈出了将该模型嵌入弦理论稳定的压缩中的第一步。首先，我们对EDE场景及其主要挑战提供了教学评论。其次，我们仅使用最小成分构建一个简单的超级超级玩具模型。在这个级别上，我们可以从单独的非扰动效应的主要术语平衡来理解EDE标量潜力的谐波的起源。第三和最后，我们将模型嵌入了KKLT型压实中，EDE标量场由两种形式的轴实现。我们发现，成功的嵌入，所有模量稳定，都需要对Pfaffians和负责EDE动力学的非扰动术语的指数进行限制性假设。我们指出，这种非传播条件反映了EDE模型的众所周知的挑战，进一步的调查可能会指导我们达成决定性解决方案。
Early Dark Energy (EDE) is a prominent model to resolve the Hubble tension, which employs a dynamical axion with a periodic potential. In this work, we take first steps towards the embedding of this model into stable compactifications of string theory. First, we provide a pedagogical review of the EDE scenario and its main challenges. Second, we construct a simple supergravity toy model using only minimal ingredients. Already at this level, we can understand the origin of the harmonics of the EDE scalar potential in terms of a delicate balance of the leading terms from separate non-perturbative effects. Third and final, we embed the model into a KKLT-type compactification, with the EDE scalar field realized by a two-form axion. We find that a successful embedding, with all moduli stabilized, requires restrictive assumptions both on the Pfaffians and on the exponents of the non-perturbative terms responsible for the EDE dynamics. We point out that such non-generic conditions reflect well known challenges of the EDE model and further investigation might guide us towards a conclusive resolution.
