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Generalised global symmetries in holography: magnetohydrodynamic waves in a strongly interacting plasma

Generalised global symmetries in holography: magnetohydrodynamic waves in a strongly interacting plasma


Titill: Generalised global symmetries in holography: magnetohydrodynamic waves in a strongly interacting plasma
Höfundur: Grozdanov, Sašo
Poovuttikul, Napat   orcid.org/0000-0003-2458-8622
Útgáfa: 2019-04-23
Tungumál: Enska
Umfang: 141
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Raunvísindastofnun (HÍ)
Science Institute (UI)
Birtist í: Journal of High Energy Physics;2019(4)
ISSN: 1029-8479
DOI: 10.1007/JHEP04(2019)141
Efnisorð: Effective Field Theories; Gauge-gravity correspondence; Global Symmetries; Holography and quark-gluon plasmas; Sviðsfræði
URI: https://hdl.handle.net/20.500.11815/1779

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Tilvitnun:

Grozdanov, S., Poovuttikul, N. Generalised global symmetries in holography: magnetohydrodynamic waves in a strongly interacting plasma. Journal of High Energy Physics 2019, 141 (2019). https://doi.org/10.1007/JHEP04(2019)141

Útdráttur:

We begin the exploration of holographic duals to theories with generalised global (higher-form) symmetries. In particular, we focus on the case of magnetohydrodynamics (MHD) in strongly coupled plasmas by constructing and analysing a holographic dual to a recent, generalised global symmetry-based formulation of dissipative MHD. The simplest holographic dual to the effective theory of MHD that was proposed as a description of plasmas with any equation of state and transport coefficients contains dynamical graviton and two-form gauge field fluctuations in a magnetised black brane background. The dual field theory, which is closely related to the large-N c , N = 4 supersymmetric Yang-Mills theory at (infinitely) strong coupling, is, as we argue, in our setup coupled to a dynamical U(1) gauge field with a renormalisation condition-dependent electromagnetic coupling. After constructing the holographic dictionary for gauge-gravity duals of field theories with higher-form symmetries, we compute the dual equation of state and transport coefficients, and for the first time analyse phenomenology of MHD waves in a strongly interacting, dense plasma with a (holographic) microscopic description. From weak to extremely strong magnetic fields, several predictions for the behaviour of Alfvén and magnetosonic waves are discussed.

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