论文标题
增强超固体通货膨胀的GWS
Boosting GWs in Supersolid Inflation
论文作者
论文摘要
由通用自我磨削介质驱动的通货膨胀是研究在准表个阶段中自发时空对称性破坏的影响的有趣替代方法，特别是GR的4维差异不变性被自发地分解为$ ISO（3）$。有效的描述基于描述超olid激励的四个标量场。有两个类似语音的传播标量自由度，它们在早期和晚期都非平凡地混合，在退出地平线后，会引起不同标量功率谱之间的非平凡相关性。该理论的非线性结构允许在通货膨胀期间产生二级引力波，足以使当前的实验结合饱和，并具有蓝色倾斜的光谱指数。
Inflation driven by a generic self-gravitating medium is an interesting alternative to study the impact of spontaneous spacetime symmetry breaking during a quasi de-Sitter phase, in particular the 4-dimensional diffeomorphism invariance of GR is spontaneously broken down to $ISO(3)$. The effective description is based on four scalar fields that describe the excitations of a supersolid. There are two phonon-like propagating scalar degrees of freedom that mix non-trivially both at early and late times and, after exiting the horizon, give rise to non-trivial correlations among the different scalar power spectra. The non-linear structure of the theory allows a secondary gravitational waves production during inflation, efficient enough to saturate the present experimental bound and with a blue-tilted spectral index.
