Time machines and quantum theory
arXiv:gr-qc/0612015
Abstract
There is a deep structural link between acausal spacetimes and quantum theory. As a consequence quantum theory may resolve some "paradoxes" of time travel. Conversely, non-time-orientable spacetimes naturally give rise to electric charges and spin half. If an explanation of quantum theory is possible, then general relativity with time travel could be it.
17 pages, contribution to the proceedings of MG11, Berlin, 23-29 July, 2006; based on the rapporteur talk of the parallel session GT5, Wormholes, Energy Conditions and Time Machines