D7-brane chaotic inflation
D7-brane chaotic inflation
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DOI：
10.1016/j.physletb.2014.08.028
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发表时间：
2014-04
影响因子：
4.4
通讯作者：
A. Hebecker;Sebastian C. Kraus;L. Witkowski
中科院分区：
文献类型：
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作者：
A. Hebecker;Sebastian C. Kraus;L. Witkowski
我们分析了弦理论的大领域的通货膨胀制度的自发破碎的超引力与传统的模量稳定的通量和非微扰效应。主要成分是一个移位对称的凯勒潜力，补充通量诱导移位对称性破缺的超势。主要的技术观察是，所有这些特征都存在于IIB型定向褶皱中的D 7-膜位置模中，这可能允许在弦理论紧化中实现轴子单值性提议。此外，我们的模型是明确的，足以解决问题的控制和模量稳定定量。一方面，在大的复杂结构制度的D 7-膜位置模继承了移位对称性，从他们的镜像对偶IIA型威尔逊线。另一方面，IIB型通量超势一般打破了这种移位对称性，并允许通过呼吁大通量离散，调整相关系数小。D 7-膜模空间中的移位对称方向可以扮演暴胀子的角色：当D 7-膜在卡-丘轨道上绕某个轨道多次时，相应的F项能量密度增长非常缓慢，这要归功于上面提到的通量的调谐。为了成功，我们的模型需要的duplex，所有复杂的结构模和所有的D 7膜模，除了暴胀子是固定在领先的顺序通量。然后，大场暴胀轨迹可以在凯勒、复结构和其他膜模量以常规方式稳定的状态下实现，正如我们使用大体积情景的例子所证明的那样。
We analyze string-theoretic large-field inflation in the regime of spontaneously-broken supergravity with conventional moduli stabilization by fluxes and non-perturbative effects. The main ingredient is a shift-symmetric Kähler potential, supplemented by flux-induced shift symmetry breaking in the superpotential. The central technical observation is that all these features are present for D7-brane position moduli in Type IIB orientifolds, potentially allowing for a realization of the axion monodromy proposal in a string theory compactification. Furthermore, our model is explicit enough to address issues of control and moduli stabilization quantitatively. On the one hand, in the large complex structure regime the D7-brane position moduli inherit a shift symmetry from their mirror-dual Type IIA Wilson lines. On the other hand, the Type IIB flux superpotential generically breaks this shift symmetry and allows, by appealing to the large flux discretuum, to tune the relevant coefficients to be small. The shift-symmetric direction in D7-brane moduli space can then play the role of the inflaton: While the D7-brane circles a certain trajectory on the Calabi–Yau many times, the correspondingF-term energy density grows only very slowly, thanks to the above-mentioned tuning of the flux. To be successful our model requires that the dilaton, all complex structure moduli and all D7-brane moduli except the inflaton are fixed at leading order by fluxes. Then the large-field inflationary trajectory can be realized in a regime where Kähler, complex structure and other brane moduli are stabilized in a conventional manner, as we demonstrate using the example of the Large Volume Scenario.