论文标题
曲率反弹的详细分析：CMB中的背景动态和烙印
Detailed analysis of the curvature bounce: background dynamics and imprints in the CMB
论文作者
论文摘要
如果宇宙的空间部分是积极弯曲的，则不可避免地会导致经典的反弹推断出通货膨胀阶段。这种简单的场景（非单一的且不具有异国情调的物理学）值得详细研究。背景动力学表现出有趣的特征，只要考虑观察后果，就显示出对初始条件的不敏感。针对不同的充气电位，明确计算了原始标量功率谱，并计算了随后的CMB温度各向异性。结果与当前测量值兼容。但是，关于标准范式的一些偏差可能会出现在很大的范围内，我们仔细地将与真空选择相关的内容与弹跳本身更为根本上的内容相关。
If the spatial sections of the Universe are positively curved, extrapolating the inflationary stage backward in time inevitably leads to a classical bounce. This simple scenario, non-singular and free of exotic physics, deserves to be investigated in details. The background dynamics exhibits interesting features and is shown to be mostly insensitive to initial conditions as long as observational consequences are considered. The primordial scalar power spectrum is explicitly computed, for different inflaton potentials, and the subsequent CMB temperature anisotropies are calculated. The results are compatible with current measurements. Some deviations with respect to the standard paradigm can however appear at large scales and we carefully disentangle what is associated with the vacuum choice with what is more fundamentally due to the bounce itself.
