论文标题
通货膨胀端动力学的分析公式及其对原始引力波的影响
Analytic formula for the dynamics around inflation end and implications on primordial gravitational waves
论文作者
论文摘要
我们认为原始引力波有频谱中断，其信息对于探索早期宇宙非常有用。实际上，这种光谱中断可以是通货膨胀终结的指纹，而突破时的振幅和频率可以同时告诉我们通货膨胀的能量尺度和加热温度。为了研究光谱中断，我们给出了一个分析公式，用于在通货膨胀末端末尾的哈勃参数演化，其中慢速滚动近似分解。我们还使用分析公式用于通货膨胀动力学，评估了围绕断裂点半分析的原始引力波的光谱。
We argue that primordial gravitational waves have a spectral break and its information is quite useful for exploring the early universe. Indeed, such a spectral break can be a fingerprint of the end of inflation, and the amplitude and the frequency at the break can tell us the energy scale of inflation and the reheating temperature simultaneously. In order to investigate the spectral break, we give an analytic formula for evolution of the Hubble parameter around the end of inflation where the slow roll approximation breaks down. We also evaluate the spectrum of primordial gravitational waves around the break point semi-analytically using the analytic formula for the inflation dynamics.
