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arXiv 1401.7613hep-ph
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早期宇宙的能量密度涨落

Energy density fluctuations in Early Universe

G. L. Guardo, V. Greco, M. Ruggieri

摘要:

元素的原始核态可以受到大爆炸后发生的相变的影响,例如QCD相变。为了研究这一相变的影响,本文以描述早期宇宙等离子体中强相互作用物质的格点量子色动力学状态方程为输入,通过求解相关的运动方程,计算了早期宇宙中温度和能量密度涨落的物理量随时间的演化.我们还利用唯象状态方程研究了原初强磁场的作用。我们的研究结果表明,在早期宇宙中的强相互作用物质的小的不均匀性是适度阻尼在交叉。

英文摘要:

The primordial nucleosinthesys of the element can be influenced by the transitions of phase that take place after the Big Bang, such as the QCD transition. In order to study the effect of this phase transition, in this work we compute the time evolution of thermodynamical quantities of the early universe, focusing on temperature and energy density fluctuations, by solving the relevant equations of motion using as input the lattice QCD equation of state to describe the strongly interacting matter in the early universe plasma. We also study the effect of a primordial strong magnetic field by means of a phenomenological equation of state. Our results show that small inhomogeneities of strongly interacting matter in the early Universe are moderately damped during the crossover.

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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