Stochastic background of gravitational waves from hybrid preheating.
Stochastic background of gravitational waves from hybrid preheating.
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DOI：
10.1103/physrevlett.98.061302
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发表时间：
2006-12
影响因子：
8.6
通讯作者：
J. García-Bellido;Daniel G. Figueroa
中科院分区：
文献类型：
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作者：
J. García-Bellido;Daniel G. Figueroa
混合暴胀后宇宙的再加热过程是极其剧烈的。它通过成核和随后的气泡状结构中的大能量密度的碰撞进行，这产生了引力波形式的能量的重要部分。研究了混合暴胀后再加热时产生的引力波随机背景的功率谱。我们发现，振幅可能是显着的高尺度模型，虽然典型的频率是远远超出了计划的引力波观测站可以达到的。另一方面，低尺度模型仍然可以在这些检测器可访问的频率上产生可检测的随机背景。这种背景的发现将为我们打开一扇了解早期宇宙的新窗口。
The process of reheating the Universe after hybrid inflation is extremely violent. It proceeds through the nucleation and subsequent collision of large concentrations of energy density in bubblelike structures, which generate a significant fraction of energy in the form of gravitational waves. We study the power spectrum of the stochastic background of gravitational waves produced at reheating after hybrid inflation. We find that the amplitude could be significant for high-scale models, although the typical frequencies are well beyond what could be reached by planned gravitational wave observatories. On the other hand, low-scale models could still produce a detectable stochastic background at frequencies accessible to those detectors. The discovery of such a background would open a new window into the very early Universe.