标题： 2+1维中的黑洞和虫洞 显示英文标题

标题： Black Holes and Wormholes in 2+1 Dimensions

摘要： 许多时空——包括BTZ黑洞——可以通过在2+1维反德西特空间中通过离散的等距群来识别点而获得。 我们考虑所有在这种限制下可以得到的时空，即仅考虑时间对称的初始数据和一个渐近区域。 所得到的时空是非永恒的黑洞，具有塌陷虫洞拓扑结构。 我们的方法是几何学的，并详细讨论了：允许的拓扑结构、事件视界的形状、拓扑审查和陷获曲线。 显示英文摘要

摘要： A large variety of spacetimes---including the BTZ black holes---can be obtained by identifying points in 2+1 dimensional anti-de Sitter space by means of a discrete group of isometries. We consider all such spacetimes that can be obtained under a restriction to time symmetric initial data and one asymptotic region only. The resulting spacetimes are non-eternal black holes with collapsing wormhole topologies. Our approach is geometrical, and we discuss in detail: The allowed topologies, the shape of the event horizons, topological censorship and trapped curves.