English

The orientability of spacetime

General Relativity and Quantum Cosmology 2009-11-07 v4 Quantum Physics

Abstract

Contrary to established beliefs, spacetime may not be time-orientable. By considering an experimental test of time orientability it is shown that a failure of time-orientability of a spacetime region would be indistinguishable from a particle antiparticle annihilation event.

Keywords

Cite

@article{arxiv.gr-qc/0202031,
  title  = {The orientability of spacetime},
  author = {Mark J Hadley},
  journal= {arXiv preprint arXiv:gr-qc/0202031},
  year   = {2009}
}

Comments

5 Pages plus 3 figures. More explanations added as requested by referees. Figures enhanced

R2 v1 2026-07-22T12:35:11.793Z