Linking and causality in (2+1)-dimensional static spacetimes
广义相对论与量子宇宙学
2012-07-16 v3
摘要
Given a (d+1)-dimensional spacetime (M,g), one can consider the set N of all its null geodesics. If (M,g) is globally hyperbolic then this set is naturally a smooth (2d-1)-manifold. The sky of an event x in M is the set X of all null geodesics through x, and is an embedded submanifold of N diffeomorphic to S^{d-1}. Low conjectured that if d=2 then x,y are causally related in M iff X,Y are linked in N. We prove Low's conjecture for a (large) class of static spacetimes.
引用
@article{arxiv.gr-qc/0108061,
title = {Linking and causality in (2+1)-dimensional static spacetimes},
author = {Jose Natario},
journal= {arXiv preprint arXiv:gr-qc/0108061},
year = {2012}
}
备注
13 pages, 3 figures; typos corrected, 2 figures added