A delicate universe: compactification obstacles to D-brane inflation.
A delicate universe: compactification obstacles to D-brane inflation.
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微妙的宇宙：D 膜膨胀的致密化障碍。
DOI：
10.1103/physrevlett.99.141601
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发表时间：
2007
影响因子：
8.6
通讯作者：
P. Steinhardt
中科院分区：
文献类型：
--
作者：
D. Baumann;A. Dymarsky;I. Klebanov;L. McAllister;P. Steinhardt
我们研究了在弦紧化中是否存在扭曲d膜膨胀的显式模型。为此，我们研究了包含全纯嵌入的d7膜参与模稳定的弯曲折叠中的d3膜运动的潜力。d7膜的存在显著地改变了暴胀的可能性。我们基于Kuperstein的一个非常简单和对称的嵌入构造了一个例子，z1= const，其中可以微调潜力，以便发生慢滚动膨胀。由此产生的模型相当微妙：暴胀发生在拐点附近，宇宙学预测对势的精确形状极为敏感。
We investigate whether explicit models of warped D-brane inflation are possible in string compactifications. To this end, we study the potential for D3-brane motion in a warped conifold that includes holomorphically embedded D7-branes involved in moduli stabilization. The presence of the D7-branes significantly modifies the inflaton potential. We construct an example based on a very simple and symmetric embedding due to Kuperstein, z1= const, in which it is possible to fine-tune the potential so that slow-roll inflation can occur. The resulting model is rather delicate: inflation occurs in the vicinity of an inflection point, and the cosmological predictions are extremely sensitive to the precise shape of the potential.