论文标题
早期标量张量时期原始张量光谱的升高
The rise of the primordial tensor spectrum from an early scalar-tensor epoch
论文作者
论文摘要
通货膨胀期间产生的原始重力波（PGW）跨越了许多频率，并提供有关原始宇宙动力学的信息。在早期的标量张量主导的时期期间，可以在广泛的频率上增强PGW光谱的幅度。为了研究这种现象，我们专注于一类标量调整理论，这是由深色能量和深色物质的高能源理论充分激励的，在早期宇宙学演化期间，标量与物质耦合到物质。对于以形式为主导的时期，PGW频谱具有平坦的阶梯状形状。更有趣的是，异体主导的时期的特征是峰值光谱具有损坏的幂律特征，其斜率取决于所考虑的标量调整理论。我们引入了一个图形工具，称为破碎的幂律灵敏度曲线，作为一个方便的视觉指示器，用于理解GW实验是否可以检测到给定的破碎的幂律配置文件。然后，我们分析了各种代表性的保形和异形模型的GW光谱，与爱因斯坦望远镜（ET），激光干涉仪太空天线（LISA），Deci-Hertz干涉仪重力仪重力仪（DECIGO）以及Big Bang Bang Apperver（BBO）讨论了它们的可检测性前景。
Primordial gravitational waves (PGW) produced during inflation span a large range of frequencies, carrying information on the dynamics of the primordial universe. During an early scalar-tensor dominated epoch, the amplitude of the PGW spectrum can be enhanced over a wide range of frequencies. To study this phenomenon, we focus on a class of scalar-tensor theories, well motivated by high energy theories of dark energy and dark matter, where the scalar is conformally and disformally coupled to matter during the early cosmological evolution. For a conformally dominated epoch, the PGW spectrum has a flat step-like shape. More interestingly, a disformally dominated epoch is characterised by a peaked spectrum with a broken power-law profile, with slopes depending on the scalar-tensor theory considered. We introduce a graphical tool, called broken power-law sensitivity curve, as a convenient visual indicator for understanding whether a given broken power-law profile can be detected by GW experiments. We then analyse the GW spectra for a variety of representative conformal and disformal models, discussing their detectability prospects with the Einstein Telescope (ET), Laser Interferometer Space Antenna (LISA), DECi-hertz Interferometer Gravitational wave Observatory (DECIGO), and Big Bang Observer (BBO).
