论文标题
贝叶斯定理，通货膨胀和ekpyration宇宙
Bayes' Theorem, Inflation, and the Ekpyrotic Universe
论文作者
论文摘要
我们计算了一类Ekpyrototic Univers模型的贝叶斯证据，并与具有HIGGS型电势的单场通胀模型进行比较。结合了简约和观察性约束，这为我们提供了一种系统的方法来评估ekpyrotic模型受普朗克CMB数据约束的程度。我们以数值方式整合运动方程，以使用Planck 2018数据来定义可能性，并品尝此可能性以获取贝叶斯证据。先验是合理的，并用来将ekpyrotic模型和通货膨胀置于平等的基础上。我们发现对一种考虑的ekpyrotic模型之一而不是其他人的合理偏爱，但是与希格斯通货膨胀相比，即使是这种模型也是如此。
We calculate the Bayesian evidences for a class of Ekpyrotic universe models, and compare with a model of single field inflation with a Higgs-type potential. Combining parsimony and observational constraints, this gives us a systematic way to evaluate the degree to which Ekpyrotic models are constrained by CMB data from Planck. We integrate the equations of motion numerically to define a likelihood using Planck 2018 data and sample this likelihood to obtain Bayesian evidences. Priors are justified and used to put Ekpyrotic models and inflation on equal footing. We find reasonable preference for one of the considered Ekpyrotic models over the others, but that even this one is disfavored compared with Higgs inflation.
