Swampland distance conjecture, inflation and α-attractors
Swampland distance conjecture, inflation and α-attractors
复制标题
沼泽距离猜想、暴胀和 α 吸引子
DOI：
10.1007/jhep08(2019)160
复制
发表时间：
2019
影响因子：
5.4
通讯作者：
Valenzuela, Irene
中科院分区：
文献类型：
--
作者：
Scalisi, Marco;Valenzuela, Irene
沼泽地距离猜想（Swampland Distance Conjecture，SDC）限制了任何与量子引力一致的有效场论的场空间中无限远处出现的动力学。它提供了一个截止能量和字段范围之间的关系，正如我们所示，在通货膨胀的背景下，它产生了一个普遍的上限的暴胀子偏移的张量标量比，在典型的CMB尺度测量。在这篇笔记中，我们研究了弦论中无限远奇点周围的SDC和突现暴胀物理之间的相互作用，特别是它对暴胀的α吸引子情景的意义。我们表明，猜想本身表明，暴胀可能会出现作为一个无限远的现象与渐近动力学结构典型的α吸引子。此外，我们认为，一个适当的弦实现这些宇宙模型在卡-丘流形应发生在无限场距离奇点。然而，这样的结构通常意味着暴胀不应该发生在暴胀动力学项发展极点的极限，而是相反的状态。最后，我们研究了SDC对α吸引子的约束，并表明它们仍然有相当大的空间与观测相容。
The Swampland Distance Conjecture (SDC) constraints the dynamics emerging at infinite distances in field space of any effective field theory consistent with quantum gravity. It provides a relation between the cut-off in energies and the field range which, as we show, in the context of inflation it yields a universal upper bound on the inflaton excursion in terms of the tensor-to-scalar ratio, measured at typical CMB scales. In this note, we investigate the interplay between the SDC and the emergent inflationary physics around infinite distances singularities in string theory, with a special look at its significance for the α-attractor scenario of inflation. We show that the conjecture itself suggests that inflation may arise as an infinite distance phenomenon with the asymptotic kinetic structure typical of α-attractors. Furthermore, we argue that a proper string realisation of these cosmological models in Calabi-Yau manifolds should occur around infinite field distance singularities. However, such constructions typically imply that inflation should not take place in the limit where the inflaton kinetic term develops a pole but rather in the opposite regime. Finally, we study the constraints that the SDC poses on α-attractors and show that they still leave considerable room for compatibility with observations.
登录
查看更多内容
幂零凯勒修正带来的通货膨胀
影响因子：
6.4
作者：
Evan McDonough;M. Scalisi
通讯作者：
M. Scalisi
影响因子：
5
作者：
D. Roest;M. Scalisi
通讯作者：
D. Roest;M. Scalisi
影响因子：
5.4
作者：
M. Cicoli;David Ciupke;C. Mayrhofer;P. Shukla
通讯作者：
P. Shukla
影响因子：
5.4
作者：
S. Bielleman;L. Ibáñez;F. Pedro;I. Valenzuela;Clemens Wieck
通讯作者：
Clemens Wieck
极N-膨胀
影响因子：
5.4
作者：
M. Dias;J. Frazer;A. Retolaza;M. Scalisi;A. Westphal
通讯作者：
A. Westphal