论文标题
来自多个伪量表的通货膨胀：PBH暗物质和重力波
Inflation from Multiple Pseudo-Scalar Fields: PBH Dark Matter and Gravitational Waves
论文作者
论文摘要
我们研究了通过Chern-Simons相互作用的多个伪量表领域与$ U（1）$ GAUGE场相结合的通货膨胀模型。由于违反了相互作用的平均值，量规场的一个极化被放大以增强曲率扰动功率谱。当每个伪量表场朝其最小屈服至曲率扰动功率谱在通货膨胀期间的各个尺度下的曲率扰动功率谱中的最小峰值，通货膨胀率在多个阶段进行。功率光谱中的局部峰会产生原始黑洞（PBH），可以提供大量的暗物质（DM）丰度。另外，产生具有非平凡光谱的重力波（GWS），它们在各种即将到来的GW观测值的灵敏度范围内。
We study a model of inflation with multiple pseudo-scalar fields coupled to a $U(1)$ gauge field through Chern-Simons interactions. Because of parity violating interactions, one polarization of the gauge field is amplified yielding to enhanced curvature perturbation power spectrum. Inflation proceeds in multiple stages as each pseudo-scalar field rolls towards its minimum yielding to distinct multiple peaks in the curvature perturbations power spectrum at various scales during inflation. The localized peaks in power spectrum generate Primordial Black Holes (PBHs) which can furnish a large fraction of Dark Matter (DM) abundance. In addition, gravitational waves (GWs) with non-trivial spectra are generated which are in sensitivity range of various forthcoming GW observatories.
