Gravitomagnetic Helicity
arXiv:2112.07550 · doi:10.1103/PhysRevD.105.064028
Abstract
Mass currents in astrophysics generate gravitomagnetic fields of enormous complexity. Gravitomagnetic helicity, in direct analogy with magnetic helicity, is a measure of entwining of the gravitomagnetic field lines. We discuss gravitomagnetic helicity within the gravitoelectromagnetic (GEM) framework of linearized general relativity. Furthermore, we employ the spacetime curvature approach to GEM in order to determine the gravitomagnetic helicity for static observers in Kerr spacetime.
30 pages; v2: improved version to appear in Phys. Rev. D; v3: typos corrected
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- Quantum gravitomagnetic interaction
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