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arXiv 2402.00451hep-thgr-qc
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来自IIB/F理论的暴胀α-吸引子

Inflationary $α$-Attractor From Type IIB/F Theory

Arunoday Sarkar, Buddhadeb Ghosh

AI总结:

本文在IIB/F理论的T^6/Z_N紧致化中,从三张相交D7膜构型推导出α=1/3吸引子慢滚暴胀势,揭示开弦模驱动径向暴胀并给出普适宇宙学预言。

摘要:

我们在IIB/F理论中,在具有某些近锥形区域的T^6/Z_N型CY_3紧致化框架下,从三张相交的D7膜构成的几何构型中推导出一个α=1/3的慢滚暴胀吸引子势。我们发现,当开启开弦模的一个额外贡献时,动极点的底层二次结构源于Kähler势中的一项修正。模谱的闭弦部分通过微扰和非微扰起源的量子修正被完全稳定,而开弦部分在驱动径向方向的暴胀膨胀中起主导作用。暴胀场在极点边界附近的普遍渐近行为表现为正则场空间中的慢滚平台,这负责给出宇宙学参数的普适预言。我们发现,近锥形区域附近开弦的存在使得极点暴胀在当前构型中得以实现。最后,我们将结果与类似模型进行比较,并讨论了在正在进行和即将进行的宇宙学巡天观测背景下探索α精确值的重要性。

英文摘要:

We derive an $α=1/3$ - attractor potential of slow-roll inflation in the geometric set-up of three intersecting $D7$ branes under $T^6/Z_N$ type of $CY_3$-compactification within type IIB/F theory with some near-conifold regions. The underlying quadratic structure of the kinetic poles is found to arise from a correction in the Kähler potential when an extra contribution of open string moduli is turned on. While the closed string sector of the moduli spectrum is completely stabilized via quantum corrections of perturbative and non-perturbative origin, the open string sector plays the lead role in driving the inflationary expansion in the radial direction. A generic asymptotic behavior of the inflaton field near the pole boundaries manifests as the slow-roll plateau in canonical field space, which becomes responsible for giving universal predictions of the cosmological parameters. We find that the presence of the open strings near conifold regions brings the realization of pole inflation in the present set up. Finally we compare our results with similar models and discuss the importance of exploring precise values of $α$ in the light of ongoing and forthcoming cosmological surveys.

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