Ray trajectories for a spinning cosmic string and a manifestation of self-cloaking

Details Ray trajectories for a spinning cosmic string and a manifestation of self-cloaking Ray trajectories for a spinning cosmic string and a manifestation of self-cloaking

2010-07-19

arxiv.org/abs/1007.3113v1

Phys.Lett.A374:4637-4641,2010

Physics

Optics

Scientific paper

10.1016/j.physleta.2010.09.053

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.

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