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arXiv 1002.1555astro-ph.COgr-qchep-ph
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畴壁坍塌产生的引力波

Gravitational Waves from Collapsing Domain Walls

Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa

摘要:

我们研究了早期宇宙相变过程中产生的宇宙畴壁产生引力波的过程。我们通过三维晶格模拟研究了畴壁的形成和演化过程。如果我们引入一个近似的离散对称性,壁就会变成亚稳态,最后消失。我们计算了亚稳畴壁坍缩产生的引力波谱。通过对数值结果的外推,我们发现在下一代引力波干涉仪中可以观测到能量在10^10-10^12GeV的畴壁产生的引力波信号。

英文摘要:

We study the production of gravitational waves from cosmic domain walls created during phase transition in the early universe. We investigate the process of formation and evolution of domain walls by running three dimensional lattice simulations. If we introduce an approximate discrete symmetry, walls become metastable and finally disappear. We calculate the spectrum of gravitational waves produced by collapsing metastable domain walls. Extrapolating the numerical results, we find the signal of gravitational waves produced by domain walls whose energy scale is around 10^10-10^12GeV will be observable in the next generation gravitational wave interferometers.

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