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Título

Electromagnetism as an emergent phenomenon: a step-by-step guide

AutorBarceló, Carlos CSIC ORCID; Carballo Rubio, Raúl CSIC ORCID; Garay, Luis Javier CSIC ORCID; Jannes, Gil CSIC ORCID
Palabras claveGravity
Gauge invariance
Quantum gravity
Electrodynamics
Emergent gravity
Fecha de publicación2014
EditorInstitute of Physics Publishing
CitaciónNew Journal of Physics 16: 123028 (2014)
ResumenWe 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
Descripción38 pags.; 4 figs.; Open Access funded by Creative Commons Attribution 3.0 licence.
Versión del editorhttp://dx.doi.org/10.1088/1367-2630/16/12/123028
URIhttp://hdl.handle.net/10261/117431
DOI10.1088/1367-2630/16/12/123028
Identificadoresdoi: 10.1088/1367-2630/16/12/123028
issn: 1367-2630
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Este item está licenciado bajo una Licencia Creative Commons Creative Commons