Under the belief that the universe should be multi-feature and informative, we employ a model-by-model comparison method to explore the possibly largest upper bound on the swampland constant $c$. Considering the interacting quintessence dark energy as the comparison model, we constrain the large parameter space interacting dark energy model, a 12-parameter extension to the $\Lambda$CDM cosmology, in light of current observations. We obtain the largest $2\sigma$ ($3\sigma$) bound so far, $c\lesssim 1.62$ $(1.94)$, which would allow the existences of a number of string theory models of dark energy such as 11-dimensional supergravity with double-exponential potential, $O\left(16\right)\times O\left(16\right)$ heterotic string and some Type II string compactifications. For inflationary models with concave potential, we find the $2\sigma$ ($3\sigma$) bound $c\lesssim 0.13$ $(0.14)$, which is still in strong tension with the string-based expectation $c\sim \mathcal{O}\left(1\right)$. However, combining Planck primordial non-Gaussianity with inflation constraints, it is interesting that the Dirac–Born–Infeld inflation with concave potential gives the $2\sigma$ ($3\sigma$) bound $c\lesssim 0.53$ $(0.58)$, which is now in a modest tension with the swampland conjecture.

在认为宇宙应该具有多重特征和信息量的信念下，我们采用逐个模型的比较方法来探索沼泽地常数上可能最大的上限 $C$。将相互作用的典型暗能量作为比较模型，我们约束了大参数空间相互作用的暗能量模型，该模型是12参数扩展。$\Lambda$根据目前的观察，CDM宇宙学。我们获得最大的$2\sigma$ （$3\sigma$）到目前为止， $C\lesssim \mathrm{1个}。62$ $（\mathrm{1个}。94）$，这将允许存在许多暗能量的弦论模型，例如具有双指数势能的11维超重力， $Ø（16）\times Ø（16）$杂散字符串和某些II型字符串压缩。对于具有凹势的通胀模型，我们发现$2\sigma$ （$3\sigma$）绑定 $C\lesssim 0。13$ $（0。14）$，它仍然与基于字符串的期望保持强烈的张力 $C〜\mathcal{Ø}（\mathrm{1个}）$。但是，结合普朗克原始非高斯性和通胀约束，有趣的是，具有凹势的狄拉克-博恩-因费尔德通胀率使$2\sigma$ （$3\sigma$）绑定 $C\lesssim 0。53$ $（0。58）$，现在与沼泽地猜想处于适度的紧张状态。