论文标题
耦合典型动力学与电磁学
Coupling quintessence kinetics to electromagnetism
论文作者
论文摘要
我们提出了一个通用模型，其中的典型伴侣通过其动力学术语伴侣将其伴随到电磁词。这种新颖性概括了量规动力对$ ϕ $的线性依赖性，这是文献中通常采用的。这种相互作用自然诱导了可以在异常耦合框架内配制的细胞结构常数的时间变化，类似于戈登度量。通过标量场和耦合函数的适当参数化，我们测试了模型，以敏感的$α$变化敏感。我们进行贝叶斯分析，以基于地球，天体物理和早期宇宙实验的数据来推断自由参数。我们发现，$α$的演变特定于每个宇宙学时代，并在深色能量加速宇宙的后期减慢。虽然从原子钟测量中获得了对交互作用的最严格绑定，但类星体提供了与弱等效原理测试一致的约束。这种有前途的模型将通过即将进行的，更精确的天体物理测量（例如浓缩咖啡仪的天体物理测量值）进行进一步测试。
We propose a general model where quintessence couples to electromagnetism via its kinetic term. This novelty generalizes the linear dependence of the gauge kinetic function on $ϕ$, commonly adopted in the literature. The interaction naturally induces a time variation of the fine-structure constant that can be formulated within a disformally coupled framework, akin to a Gordon metric. Through a suitable parametrization of the scalar field and the coupling function, we test the model against observations sensitive to the variation of $α$. We undertake a Bayesian analysis to infer the free parameters with data from Earth based, astrophysical and early Universe experiments. We find that the evolution of $α$ is specific to each cosmological era and slows down at late times when dark energy accelerates the Universe. While the most stringent bound on the interaction is obtained from atomic clocks measurements, the quasars provide a constraint consistent with weak equivalence principle tests. This promising model is to be further tested with upcoming and more precise astrophysical measurements, such as those of the ESPRESSO spectrograph.
