Ray trajectories for a spinning cosmic string and a manifestation of self-cloaking
Optics
2011-01-05 v1 Cosmology and Nongalactic Astrophysics
Abstract
A study of ray trajectories was undertaken for the Tamm medium which represents the spacetime of a cosmic spinning string, under the geometric-optics approximation. Our numerical studies revealed that: (i) rays never cross the string's boundary; (ii) the Tamm medium supports evanescent waves in regions of phase space that correspond to those regions of the string's spacetime which could support closed timelike curves; and (iii) a spinning string can be slightly visible while a non-spinning string is almost perfectly invisible.
Keywords
Cite
@article{arxiv.1007.3113,
title = {Ray trajectories for a spinning cosmic string and a manifestation of self-cloaking},
author = {Tom H. Anderson and Tom G. Mackay and Akhlesh Lakhtakia},
journal= {arXiv preprint arXiv:1007.3113},
year = {2011}
}