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arXiv 1310.6399gr-qcastro-ph.COhep-th
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通货膨胀吸引因子及其测度

Inflationary Attractors and their Measures

Alejandro Corichi, David Sloan

摘要:

最近的几个误解的措施问题,在通货膨胀和通货膨胀吸引子的性质进行了讨论。我们表明,在哈密顿系统的平坦的Friedmann-Lemaintre-Robertson-Walker宇宙学耦合到一个大规模的标量场,吸引子解决方案的刘维测度的聚焦是由一个规范的自由度-空间体积的扩展。利用这一点,我们展示了如何刘维措施制定一个表面上的恒定哈勃率引起的概率分布函数表面上的其他哈勃率,和吸引子的行为被看作是通过聚焦这个功能在一个狭窄的范围内的物理观测。人们可以得出结论,然后从哈密顿动力学的标准技术足以提供一个令人满意的描述吸引子的解决方案和措施的问题。更新以匹配发布的版本。

英文摘要:

Several recent misconceptions about the measure problem in inflation and the nature of inflationary attractors are addressed. We show that within the Hamiltonian system of flat Friedmann-Lemaître-Robertson-Walker cosmology coupled to a massive scalar field, the focussing of the Liouville measure on attractor solutions is brought about by a spread in a gauge degree of freedom - the spatial volume. Using this we show how the Liouville measure formulated on a surface of constant Hubble rate induces a probability distribution function on surfaces of other Hubble rates, and the attractor behaviour is seen through the focussing of this function on a narrow range of physical observables. One can conclude then that standard techniques from Hamiltonian dynamics suffice to provide a satisfactory description of attractor solutions and the measure problem. Updated to match published version.

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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