The Ori-Soen time machine
广义相对论与量子宇宙学
2009-10-31 v3
摘要
Ori and Soen have proposed a spacetime which has closed causal curves on the boundary of a region of normal causality, all within a region where the weak energy condition (positive energy density) is satisfied. I analyze the causal structure of this spacetime in some simplified models, show that the Cauchy horizon is compactly generated, and argue that any attempt to build such a spacetime with normal matter might lead to singular behavior where the causality violation would otherwise take place.
引用
@article{arxiv.gr-qc/9907007,
title = {The Ori-Soen time machine},
author = {Ken D. Olum},
journal= {arXiv preprint arXiv:gr-qc/9907007},
year = {2009}
}
备注
5 pages, RevTeX, 7 figures with epsf, miscellaneous clarifications in v2, minor updates to correspond to version to appear in PRD