标题： 在反德西特景观中的原初宇宙 显示英文标题

标题： On primordial universe in anti-de Sitter landscape

摘要： 在具有多个反德西特（AdS）真空的景观中，时空如何非微扰地演化，这在理论上是很有动机的，一直是一个关注的问题。 作为解决这一问题的一步，我们对AdS景观中的不均匀宇宙进行了(3+1)D数值相对论模拟，发现标量场的大尺度不均匀性可以发展成不仅像球状气泡，还有新颖的管状结构。 观察到气泡或管壁（穿过势垒）可能作为准德西特（dS）空间膨胀，而由墙壁分隔的不同区域处于不同的AdS真空，并将坍缩向奇点。 显示英文摘要

摘要： How the spacetime evolved non-perturbatively in a landscape with multiple anti-de Sitter (AdS) vacua, which is theoretically well-motivated, has always been a matter of concern. As a step towards this issue, we perform (3+1)D numerical relativity simulations for the inhomogeneous universe in an AdS landscape, and find that large inhomogeneity of scalar field can develop into not only sphere-like bubbles, but also novel tube-like structures. It is observed that the bubble or tube wall (across the potential barrier) likely inflates as a quasi-dS space, while the different regions separated by the walls are in different AdS vacua and will collapse towards singularity.