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arXiv 1105.3247hep-thastro-ph.COgr-qchep-ph
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弦气体宇宙学:进展与问题

String Gas Cosmology: Progress and Problems

Robert H. Brandenberger

摘要:

弦气体宇宙学是基于弦论的基本原理和关键的新自由度而建立的一种研究极早期宇宙演化的模型,它不同于点粒子场论。在弦气体宇宙学中,宇宙开始于一个准静态的哈格多恩阶段,在此期间,空间充满了高度激发的弦状态的气体。这种弦气体的热涨落导致几乎尺度不变的曲率波动谱。因此,弦气体宇宙学是宇宙暴胀的替代理论,可以用来解释宇宙结构的起源。这篇简短的评论集中在模型的构建模块,对晚期宇宙学的预测,以及模型面临的主要问题。

英文摘要:

String Gas Cosmology is a model of the evolution of the very early universe based on fundamental principles and key new degrees of freedom of string theory which are different from those of point particle field theories. In String Gas Cosmology the universe starts in a quasi-static Hagedorn phase during which space is filled with a gas of highly excited string states. Thermal fluctuations of this string gas lead to an almost scale-invariant spectrum of curvature fluctuations. Thus, String Gas Cosmology is an alternative to cosmological inflation as a theory for the origin of structure in the universe. This short review focuses on the building blocks of the model, the predictions for late time cosmology, and the main problems which the model faces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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