Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1865401 | Physics Letters A | 2010 | 5 Pages |
Abstract
A study of ray trajectories was undertaken for the Tamm medium which represents the spacetime of a zero-tension 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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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Tom H. Anderson, Tom G. Mackay, Akhlesh Lakhtakia,