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arXiv 2005.08324hep-thastro-ph.COgr-qchep-ph
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经典弦几何中的弦宇宙学背景

String Cosmology backgrounds from Classical String Geometry

Heliudson Bernardo, Robert Brandenberger, Guilherme Franzmann

摘要:

我们介绍了一个非常早期的宇宙模型的基础上的热力学气体的封闭弦的背景下,这是非微扰的$α'$。考虑到完全$α'$修正的方程扩展到包括某些各向异性的宇宙学背景,我们描述了由气体状态方程参数化的系统在三个不同阶段的演化。使用标准的弦理论参数,我们从弦尺度内的各向同性10维宇宙开始,并将其演化为爱因斯坦框架中具有4个大时空维度和6个稳定内部维度的宇宙。

英文摘要:

We introduce a very early universe model based on the thermodynamics of a gas of closed strings in a background which is non-perturbative in $α'$. Upon considering the fully $α'$-corrected equations extended to include certain anisotropic cosmological backgrounds, we describe the evolution of the system in three different stages parametrized by the gas' equation of state. Using standard string thermodynamical arguments, we start with an isotropic 10-dimensional universe inside the string scale and evolve it towards a universe with four large spacetime dimensions and six stabilized internal dimensions in the Einstein frame.

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