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arXiv 2109.08421hep-thgr-qchep-ph
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量子修正对IIB型弦论模稳定化和de Sitter真空的影响

Remarks on the effects of quantum corrections on moduli stabilization and de Sitter vacua in type IIB string theory

Vasileios Basiouris, George K. Leontaris

摘要:

在IIB型有效理论中考察了弦环修正对de Sitter真空存在性和模稳定性问题的作用。基本的构建块是最少三个相交的D 7膜栈,三个凯勒模量,和一个新的爱因斯坦-希尔伯特项与10维有效作用量的高阶导数项。在以前的工作中,环路修正出现诱导新的对数体积依赖项的有效电位。当考虑D项贡献时,所有的Kähler模量都是稳定的,并且实现了de Sitter真空。本文对超势中的多个非微扰项进行了全面的研究。研究了对数环修正和两个非微扰超势Kähler模量相关项的联合效应。结果表明,各种通量存在大以及中等体积紧化,定义了一个德西特空间和稳定的模场。对于大体积,实现了势的一般简单形式。这样得到的有效势似乎是有前途的宇宙学应用。

英文摘要:

The rôle of string loop corrections on the existence of de Sitter vacua and the moduli stabilization problem is examined in type IIB effective theories. The fundamental building blocks are a minimum of three intersecting D7 brane stacks, three Kähler moduli, and a novel Einstein-Hilbert term associated with higher derivative terms of the 10-dimensional effective action. It was shown in previous works that loop corrections appear which induce novel logarithmic volume-dependent terms in the effective potential. When D-term contributions are considered, all Kähler moduli are stabilized and de Sitter vacua are achieved. In the present work, a comprehensive study of multiple non-perturbative terms in the superpotential is undertaken. The combined effects of the logarithmic loop corrections and two non-perturbative superpotential Kähler moduli dependent terms have been investigated. It is shown that a variety of fluxes exist for large as well as moderate volume compactifications which define a de Sitter space and stabilize the moduli fields. For large volumes, a generic simple form of the potential is achieved. The so obtained effective potential appears to be promising for cosmological applications.

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