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Título: | Electromagnetism as an emergent phenomenon: a step-by-step guide |
Autor: | Barceló, Carlos CSIC ORCID; Carballo Rubio, Raúl CSIC ORCID; Garay, Luis Javier CSIC ORCID; Jannes, Gil CSIC ORCID | Palabras clave: | Gravity Gauge invariance Quantum gravity Electrodynamics Emergent gravity |
Fecha de publicación: | 2014 | Editor: | Institute of Physics Publishing | Citación: | New Journal of Physics 16: 123028 (2014) | Resumen: | We give a detailed description of electrodynamics as an emergent theory from condensed-matter-like structures, not only per se but also as a warm-up for the study of the much more complex case of gravity. We concentrate on two scenarios that, although qualitatively different, share some important features with the idea of extracting the basic generic ingredients that give rise to emergent electrodynamics and, more generally, to gauge theories. We start with Maxwellʼs mechanical model for electrodynamics, where Maxwellʼs equations appear as dynamical consistency conditions. We next take a superfluid 3 He-like system as representative of a broad class of fermionic quantum systems whose low-energy physics reproduces classical electrodynamics (Dirac and Maxwell equations as dynamical low-energy laws). An important lesson that can be derived from both analyses is that the vector potential has a microscopic physical reality and only in the low-energy regime is this physical reality blurred in favor of gauge invariance, which in addition turns out to be secondary to effective Lorentz invariance. © 2014 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft | Descripción: | 38 pags.; 4 figs.; Open Access funded by Creative Commons Attribution 3.0 licence. | Versión del editor: | http://dx.doi.org/10.1088/1367-2630/16/12/123028 | URI: | http://hdl.handle.net/10261/117431 | DOI: | 10.1088/1367-2630/16/12/123028 | Identificadores: | doi: 10.1088/1367-2630/16/12/123028 issn: 1367-2630 |
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Electromagnetism.pdf | 1,03 MB | Adobe PDF | Visualizar/Abrir |
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