A geometrical upper bound on the inflaton range

A geometrical upper bound on the inflaton range
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暴胀范围的几何上限

DOI:
10.1007/jhep05(2018)001
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发表时间:
2018
影响因子:
5.4
通讯作者:
P. Shukla
P. Shukla
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
M. Cicoli;David Ciupke;C. Mayrhofer;P. Shukla

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摘要 我们认为,在IIB型大体积情景(LVS)弦模型中,在纳入首阶模稳定效应之后,由于卡拉比 - 丘(Calabi - Yau)凯勒锥条件,剩余平坦方向的模空间是紧致的。在宇宙学应用中,这给出了一个暴胀场范围,它有上界,类似于弱引力和沼泽地猜想的近期结果。我们通过明确表明它对从4维自反多面体得到的所有\(h^{1,1}=3\)的LVS真空成立来支持我们的论断。特别是,我们首先从克鲁泽 - 斯卡尔克(Kreuzer - Skarke)列表中搜索所有\(h^{1,1}=2\)、\(3\)和\(4\)且允许有LVS真空的卡拉比 - 丘三流形,发现了几个到目前为止未知的新的LVS几何结构。然后我们聚焦于\(h^{1,1}=3\)的情形,并表明所有环面超曲面三流形的凯勒锥迫使有效的1维LVS模空间是紧致的。我们发现,模空间大小一般只有在K3纤维化的例子中才可能是跨普朗克的。
A bstractWe argue that in type IIB LVS string models, after including the leading order moduli stabilisation effects, the moduli space for the remaining flat directions is compact due the Calabi-Yau Kähler cone conditions. In cosmological applications, this gives an inflaton field range which is bounded from above, in analogy with recent results from the weak gravity and swampland conjectures. We support our claim by explicitly showing that it holds for all LVS vacua with h1,1 = 3 obtained from 4-dimensional reflexive polytopes. In particular, we first search for all Calabi-Yau threefolds from the Kreuzer-Skarke list with h1,1 = 2, 3 and 4 which allow for LVS vacua, finding several new LVS geometries which were so far unknown. We then focus on the h1,1 = 3 cases and show that the Kähler cones of all toric hypersurface threefolds force the effective 1-dimensional LVS moduli space to be compact. We find that the moduli space size can generically be trans-Planckian only for K3 fibred examples.
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