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arXiv 1209.4448hep-th
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全局dS中回路IR发散的物理意义和结果

Physical meaning and consequences of the loop IR divergences in global dS

E. T. Akhmedov

摘要:

在arXiv:1012.2107之后,我们证明了在整体de Sitter空间中,对于任何大质量标量的不变真空态,其等距性都被环IR发散所破坏。在整体de Sitter空间中导出了动力学方程。它遵循Dyson-Schwinger方程的Schwinger-Keldysh图解技术在IR极限,并允许理解的物理意义和后果的环路IR发散。在许多方面,整体dS中的等距破缺类似于de Sitter空间的收缩Poincare补丁中的等距破缺。因此,作为一个热身运动,我们研究的动力学方程和它的解的性质在膨胀和收缩Poincare补丁的de Sitter空间。我们非常意外地发现,在某些初始条件下,在膨胀的庞加莱斑中存在大量粒子的爆炸性产生。

英文摘要:

Following arXiv:1012.2107 we show that in global de Sitter space its isometry is broken by the loop IR divergences for any invariant vacuum state of the massive scalars. We derive kinetic equation in global de Sitter space. It follows from the Dyson-Schwinger equation of the Schwinger-Keldysh diagrammatic technique in IR limit and allows to understand the physical meaning and consequences of the loop IR divergences. In many respects the isometry breaking in global dS is similar to the one in the contracting Poincare patch of de Sitter space. Hence, as a warm up exercise we study the kinetic equation and properties of its solutions in the expanding and contracting Poincare patches of de Sitter space. Quite unexpectedly we find that under some initial conditions there is an explosive production of massive particles in the expanding Poincare patch.

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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