Nearly scale invariant spectrum of gravitational radiation from global phase transitions.

Nearly scale invariant spectrum of gravitational radiation from global phase transitions.
复制标题

全球相变产生的引力辐射的近尺度不变谱。

DOI:
10.1103/physrevlett.100.131302
复制
发表时间:
2007
影响因子:
8.6
通讯作者:
H. Mathur
H. Mathur
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Katherine Jones;L. Krauss;H. Mathur

文献摘要

被引文献

相似文献

使用一个大的N sigma模型近似,我们明确地计算了引力波的功率谱所产生的全球相变在早期宇宙中,我们确认它是标度不变的,这意味着这样的频谱的观察可能不是一个独特的功能膨胀。此外,预测的振幅可以比原始的维度估计大3个数量级以上,这意味着即使在暴胀之后发生的跃迁也可能在宇宙微波背景极化或其他重力波信号中占主导地位。
Using a large N sigma model approximation we explicitly calculate the power spectrum of gravitational waves arising from a global phase transition in the early Universe and we confirm that it is scale invariant, implying an observation of such a spectrum may not be a unique feature of inflation. Moreover, the predicted amplitude can be over 3 orders of magnitude larger than the naive dimensional estimate, implying that even a transition that occurs after inflation may dominate in cosmic microwave background polarization or other gravity wave signals.