论文标题
与观众一起逃离沼泽
Escape from the swamp with spectator
论文作者
论文摘要
在弦理论的背景下，已经提出了几种猜想条件，即低能量有效场理论，而不是在swampland（紫外线分配的类别）中。最近由De Sitter和Trans-Planckian审查制度的猜想所代表的，似乎与早期宇宙的通货膨胀范式相抵触。我们首先指出，重复多次通货膨胀（多阶段通胀）的情况很容易与这些猜想兼容。换句话说，我们放宽了对大规模扰动的单个通胀的约束，仅继续至少10倍E左右。在这种情况下，我们然后研究观众字段是否可以是大规模上几乎不变的原始扰动的来源。由于这种等化的贡献，结果扰动总体上表现出非变化的非高斯性。同样，由于通货膨胀阶段的多样性，较小尺度上的扰动幅度可能与大规模完全不同。这些签名将是未来观察结果的这种情况的吸烟枪。
In the context of string theory, several conjectural conditions have been proposed for low energy effective field theories not to be in swampland, the UV-incomplete class. The recent ones represented by the de Sitter and trans-Planckian censorship conjectures in particular seem to conflict with the inflation paradigm of the early universe. We first point out that scenarios where inflation is repeated several times (multi-phase inflation) can be easily compatible with these conjectures. In other words, we relax the constraint on the single inflation for the large scale perturbations to only continue at least around 10 e-folds. In this context, we then investigate if a spectator field can be a source of the almost scale-invariant primordial perturbations on the large scale. As a consequence of such an isocurvature contribution, the resultant perturbations exhibit the non-vanishing non-Gaussianity in general. Also the perturbation amplitude on smaller scales can be completely different from that on the large scale due to the multiplicity of inflationary phases. These signatures will be a smoking gun of this scenario by the future observations.
