TY - JOUR
T1 - Global and local perspectives of gravitationally assisted negative-phase-velocity propagation of electromagnetic waves in vacuum
AU - Lakhtakia, Akhlesh
AU - Mackay, Tom G.
AU - Setiawan, Sandi
N1 - Funding Information:
We gratefully acknowledge discussions with Dr. Martin W. McCall of Imperial College, London. We thank an anonymous referee for helpful suggestions, especially relating to the Kerr metric. S.S. acknowledges EPSRC for support under grant GR/S60631/01.
PY - 2005/3/7
Y1 - 2005/3/7
N2 - Consistently with the Einstein equivalence principle and using an electromagnetic formulation first suggested by Tamm, we show that a local observer cannot observe negative-phase-velocity (NPV) propagation of electromagnetic waves in vacuum, whereas a global observer can appreciate that phenomenon. Using the specific example of the Kerr metric, we also demonstrate the possibility of NPV propagation within the ergosphere of a rotating black hole.
AB - Consistently with the Einstein equivalence principle and using an electromagnetic formulation first suggested by Tamm, we show that a local observer cannot observe negative-phase-velocity (NPV) propagation of electromagnetic waves in vacuum, whereas a global observer can appreciate that phenomenon. Using the specific example of the Kerr metric, we also demonstrate the possibility of NPV propagation within the ergosphere of a rotating black hole.
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U2 - 10.1016/j.physleta.2005.01.014
DO - 10.1016/j.physleta.2005.01.014
M3 - Article
AN - SCOPUS:13444273156
SN - 0375-9601
VL - 336
SP - 89
EP - 96
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 2-3
ER -