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The detection of GW170817 and its electromagnetic counterpart has revealed the speed of gravitational waves coincides with the speed of light, $c_{T}=1$. Inspired by the possibility that the physics implied by GW170817 might be related with that for the primordial universe, we construct the spatially flat stable (throughout the whole evolution) nonsingular bounce models in the beyond Horndeski theory with $c_{T}=1$ and in the degenerate higher-order scalar-tensor (DHOST) theory with $c_{T}=1$, respectively. Though it constricts the space of viable models, the constraint of $c_{T}=1$ makes the procedure of building models simpler. 相似文献
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文章简单介绍了标准(大爆炸)宇宙模型的成功和困难,着重介绍了暴涨宇宙学的研究历史和最近的进展,并展望了今后人们可能的关注方向 相似文献
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