@article{00902b222456493dbc127ed66e1a31b9,
title = "Effective field theory of force-free electrodynamics",
abstract = "Force-free electrodynamics (FFE) is a closed set of equations for the electromagnetic field of a magnetically dominated plasma. There are strong arguments for the existence of force-free plasmas near pulsars and active black holes, but FFE alone cannot account for the observational signatures, such as coherent radio emission and relativistic jets and winds. We reformulate FFE as the effective field theory of a cold string fluid and initiate a systematic study of corrections in a derivative expansion. At leading order the effective theory is equivalent to (generalized) FFE, with the strings comprised by magnetic field line world sheets. Higher-order corrections generically give rise to nonzero accelerating electric fields (E·B≠0). We discuss potential observable consequences and comment on an intriguing numerical coincidence.",
author = "Gralla, {Samuel E.} and Nabil Iqbal",
note = "Funding Information: It is a pleasure to acknowledge helpful discussions and correspondence with S. Grozdanov, D. Hofman, A. Jain, A. Nicolis, and N. Poovuttikul. We are grateful to the Aspen Center for Physics (which is supported by National Science Foundation Grant No. PHY-1607611), where the initial contact that would lead to this collaboration was made. S. G. is supported in part by the NSF under Grant No. PHY-1752809 to the University of Arizona. N. I. is supported in part by the STFC under consolidated Grant No. ST/L000407/1. Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.",
year = "2019",
month = may,
day = "15",
doi = "10.1103/PhysRevD.99.105004",
language = "English (US)",
volume = "99",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "10",
}