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Open AccessFeature PaperArticle

The Gravitational Magnetoelectric Effect

1
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
2
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho Sakyoku, Kyoto 606-8502, Japan
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Universe 2019, 5(4), 88; https://doi.org/10.3390/universe5040088
Received: 6 March 2019 / Revised: 27 March 2019 / Accepted: 27 March 2019 / Published: 1 April 2019
(This article belongs to the Special Issue Universe: Feature Papers 2019 - Gravitational Physics)
Electromagnetism in spacetime can be treated in terms of an analogue linear dielectric medium. In this paper, we discuss the gravitational analogue of the linear magnetoelectric effect, which can be found in multiferroic materials. While this is known to occur for metrics with non-zero mixed components, we show how it depends on the choice of spatial formalism for the electromagnetic fields, including differences in tensor weight, and also on the choice of coordinate chart. This is illustrated for Langevin–Minkowski, four charts of Schwarzschild spacetime, and two charts of pp gravitational waves. View Full-Text
Keywords: magnetoelectric effect; general relativity; analogue models magnetoelectric effect; general relativity; analogue models
MDPI and ACS Style

Gibbons, G.W.; Werner, M.C. The Gravitational Magnetoelectric Effect. Universe 2019, 5, 88.

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