标题： 由景观距离猜想选择的膨胀模型与Lyth界限 显示英文标题

标题： Inflation models selected by the swampland distance conjecture with the Lyth bound

摘要： 我们研究了从量子引力一致性的角度，Swampland猜想能在多大程度上用于约束大场暴胀模型。 特别是，我们关注Swampland距离猜想，该猜想对大场暴胀情景预测的原初引力波振幅施加了一个上限。 这与众所周知的Lyth限形成了鲜明对比，后者在这些模型中给出了张量-标量比的下限。 因此，这两个限制在评估暴胀情景的可行性方面起到了互补的作用。 我们证明，在某些代表性大场暴胀模型中，仅Swampland距离猜想就能对张量-标量比施加比当前宇宙微波背景观测约束更严格的上限。 这些发现突显了Swampland准则作为理论判据的实用性，可以在不依赖实证数据的情况下区分竞争的暴胀模型。 显示英文摘要

摘要： We investigate the extent to which the Swampland Conjecture can be employed to constrain large-field inflationary models from the perspective of quantum gravity consistency. In particular, we focus on the Swampland Distance Conjecture, which imposes an upper bound on the amplitude of primordial gravitational waves predicted by large-field inflation scenarios. This provides a striking contrast with the well-known Lyth bound, which yields a lower bound on the tensor-to-scalar ratio in such models. The two bounds thus play complementary roles in assessing the viability of inflationary scenarios. We demonstrate that, for certain representative large-field inflation models, the Swampland Distance Conjecture alone can impose more stringent upper limits on the tensor-toscalar ratio than current observational constraints from the cosmic microwave background. These findings highlight the utility of Swampland criteria as a theoretical discriminator among competing inflationary models, independent of empirical data.