Nayeri Ali, Brandenberger Robert H, Vafa Cumrun
Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2006 Jul 14;97(2):021302. doi: 10.1103/PhysRevLett.97.021302.
We study the generation of cosmological perturbations during the Hagedorn phase of string gas cosmology. Using tools of string thermodynamics we provide indications that it may be possible to obtain a nearly scale-invariant spectrum of cosmological fluctuations on scales which are of cosmological interest today. In our cosmological scenario, the early Hagedorn phase of string gas cosmology goes over smoothly into the radiation-dominated phase of standard cosmology, without having a period of cosmological inflation.
我们研究了弦气宇宙学的哈格多恩阶段期间宇宙学微扰的产生。利用弦热力学工具，我们给出了一些迹象，表明在如今具有宇宙学意义的尺度上，有可能获得近乎尺度不变的宇宙学涨落谱。在我们的宇宙学模型中，弦气宇宙学的早期哈格多恩阶段平稳过渡到标准宇宙学的辐射主导阶段，而没有宇宙暴胀时期。
