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The Kerr-Schild double copy in Lifshitz spacetime
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Alkaç2021_Article_TheKerr-SchildDoubleCopyInLifs.pdf
Date
2021-05-01
Author
Alçak, Gökhan
Gümüş, Mehmet Kemal
Tek, Mustafa
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The Kerr-Schild double copy is a map between exact solutions of general relativity and Maxwell’s theory, where the nonlinear nature of general relativity is circumvented by considering solutions in the Kerr-Schild form. In this paper, we give a general formulation, where no simplifying assumption about the background metric is made, and show that the gauge theory source is affected by a curvature term that characterizes the deviation of the background spacetime from a constant curvature spacetime. We demonstrate this effect explicitly by studying gravitational solutions with non-zero cosmological constant. We show that, when the background is flat, the constant charge density filling all space in the gauge theory that has been observed in previous works is a consequence of this curvature term. As an example of a solution with a curved background, we study the Lifshitz black hole with two different matter couplings. The curvature of the background, i.e., the Lifshitz spacetime, again yields a constant charge density; however, unlike the previous examples, it is canceled by the contribution from the matter fields. For one of the matter couplings, there remains no additional non-localized source term, providing an example for a non-vacuum gravity solution corresponding to a vacuum gauge theory solution in arbitrary dimensions.
Subject Keywords
Black Holes
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85106933727&origin=inward
https://hdl.handle.net/11511/91210
Journal
Journal of High Energy Physics
DOI
https://doi.org/10.1007/jhep05(2021)214
Collections
Department of Physics, Article
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G. Alçak, M. K. Gümüş, and M. Tek, “The Kerr-Schild double copy in Lifshitz spacetime,”
Journal of High Energy Physics
, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85106933727&origin=inward.