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

Tom H. Anderson, Tom G. Mackay, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

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 legions of the string's spacetime which could support doted timelike curves: and (iii) a spinning string can be slightly visible while a non-spinning string is almost perfectly invisible. (C) 2010 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)4637-4641
Number of pages5
JournalPhysics letters a
Volume374
Issue number46
DOIs
Publication statusPublished - 18 Oct 2010

Keywords

  • Cosmic spinning string
  • Tamm medium
  • Invisibility
  • Metamaterial
  • Ray tracing
  • NEGATIVE-PHASE-VELOCITY
  • ROTATING BLACK-HOLE
  • PROPAGATION
  • ERGOSPHERE
  • VACUUM
  • OPTICS
  • WAVES

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