A unique gravitational wave signal from phase transition during inflation
A unique gravitational wave signal from phase transition during inflation
复制标题
暴涨期间相变产生的独特引力波信号
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Siyi Zhou
中科院分区：
文献类型：
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作者：
H. An;K. Lyu;Lian;Siyi Zhou
我们研究了暴胀时期一级相变产生的引力波信号的性质。我们发现GW的功率谱随波数振荡。这个信号可以通过未来的地面和空间引力波探测器直接观测到，也可以通过CMB中的B模式光谱观测到。GW的这种振荡特征对于在膨胀期间发生的任何近似瞬时源是通用的，并且不同于来自膨胀之后的相变的GW。GW光谱的细节包含有关相变尺度和宇宙后来演化的信息。
We study the properties of the gravitational wave (GW) signals produced by first-order phase transitions during the inflation era. We show that the power spectrum of the GW oscillates with its wave number. This signal can be observed directly by future terrestrial and spatial gravitational wave detectors and through the B-mode spectrum in CMB. This oscillatory feature of GW is generic for any approximately instantaneous sources occurring during inflation and is distinct from the GW from phase transitions after the inflation. The details of the GW spectrum contain information about the scale of the phase transition and the later evolution of the universe.