@article{a52ffb387df2488fa141bc4479a17343,
title = "Causality Bounds on Dissipative General-Relativistic Magnetohydrodynamics",
abstract = "We derive necessary and sufficient conditions under which a large class of relativistic generalizations of Braginskii's magnetohydrodynamics with shear, bulk, and heat diffusion effects is causal and strongly hyperbolic in the fully nonlinear regime in curved spacetime. We find that causality severely constrains the size of nonideal effects and the onset of kinetic instabilities. Our results are crucial for assessing the regime of validity of fluid dynamical simulations of plasmas near supermassive black holes.",
author = "Ian Cordeiro and Enrico Speranza and Kevin Ingles and Bemfica, {Fabio S.} and Jorge Noronha",
note = "We thank C. Gammie, E. Most, G. Wong, and V. Dhruv for enlightening discussions about the physics of plasmas around black holes, and M. Disconzi for comments concerning the mathematical proofs presented in this work. We also thank M. Hippert for his assistance in visually depicting the causality constraints. E.\u2009S. has received funding from the European Union\u2019s Horizon Europe research and innovation program under the Marie Sk\u0142odowska-Curie Grant agreement No. 101109747. J.\u2009N. and I.\u2009C. are partly supported by the U.S. Department of Energy, Office of Science, Office for Nuclear Physics under Award No. DE-SC0023861. J.\u2009N. and E.\u2009S. thank KITP Santa Barbara for its hospitality during \u201CThe Many Faces of Relativistic Fluid Dynamics\u201D Program, where this work\u2019s last stages were completed. This research was partly supported by the National Science Foundation under Grant No. NSF PHY-1748958 and NSF PHYS-2316630. Acknowledgments We thank C. Gammie, E. Most, G. Wong, and V. Dhruv for enlightening discussions about the physics of plasmas around black holes, and M. Disconzi for comments concerning the mathematical proofs presented in this work. We also thank M. Hippert for his assistance in visually depicting the causality constraints. E.S. has received funding from the European Union s Horizon Europe research and innovation program under the Marie Ska odowska-Curie Grant agreement No. 101109747. J.N. and I.C. are partly supported by the U.S. Department of Energy, Office of Science, Office for Nuclear Physics under Award No. DE-SC0023861. J.N. and E.S. thank KITP Santa Barbara for its hospitality during The Many Faces of Relativistic Fluid Dynamics Program, where this work s last stages were completed. This research was partly supported by the National Science Foundation under Grant No. NSF PHY-1748958 and NSF PHYS-2316630.",
year = "2024",
month = aug,
day = "30",
doi = "10.1103/PhysRevLett.133.091401",
language = "English (US)",
volume = "133",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}