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Dynamical obstruction to perpetual motion from Lorentz-violating black holes

Benkel, Robert; Bhattacharyya, Jishnu; Louko, Jorma; Mattingly, David; Sotiriou, Thomas P.

Authors

Robert Benkel

Jishnu Bhattacharyya

David Mattingly

THOMAS SOTIRIOU Thomas.Sotiriou@nottingham.ac.uk
Professor of Gravitational Physics



Abstract

Black holes in Lorentz-violating theories have been claimed to violate the second law of thermodynamics by perpetual motion energy extraction. We revisit this question for a Penrose splitting process in a spherically symmetric setting with two species of particles that move on radial geodesics that extend to infinity. We show that energy extraction by this process cannot happen in any theory in which gravity is attractive, in the sense of a geometric inequality that we describe. This inequality is satisfied by all known Einstein-æther and Hořava black hole solutions.

Journal Article Type Article
Publication Date Jul 18, 2018
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 98
Issue 2
Article Number 024034
APA6 Citation Benkel, R., Bhattacharyya, J., Louko, J., Mattingly, D., & Sotiriou, T. P. (2018). Dynamical obstruction to perpetual motion from Lorentz-violating black holes. Physical Review D, 98(2), https://doi.org/10.1103/PhysRevD.98.024034
DOI https://doi.org/10.1103/PhysRevD.98.024034
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.024034
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information © 2018 American Physical Society

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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