Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-11-08
Class.Quant.Grav. 22 (2005) 909-931
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX 31 pages, 3 Figures
Scientific paper
10.1088/0264-9381/22/6/001
A new approximation scheme, designed to solve the covariant Maxwell equations inside a rotating hollow slender conducting cavity (modelling a ring-laser), is constructed. It is shown that for well-defined conditions there exist TE and TM modes with respect to the longitudinal axis of the cavity. A twisted mode spectrum is found to depend on the integrated Frenet torsion of the cavity and this in turn may affect the Sagnac beat frequency induced by a non-zero rotation of the cavity. The analysis is motivated by attempts to use ring-lasers to measure terrestrial gravito-magnetism or the Lense-Thirring effect produced by the rotation of the Earth.
Burton David A.
Noble Adam
Tucker Robin W.
Wiltshire David L.
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