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
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发表时间:
2007
影响因子:
8.6
通讯作者:
H. Mathur
中科院分区:
文献类型:
--
作者:
Katherine Jones;L. Krauss;H. Mathur
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.