dc.contributor.author | Andersen, Jens Oluf | |
dc.contributor.author | Brauner, Tomas | |
dc.contributor.author | Hofmann, CP | |
dc.contributor.author | Vuorinen, Aleksi | |
dc.date.accessioned | 2019-11-08T07:43:47Z | |
dc.date.available | 2019-11-08T07:43:47Z | |
dc.date.created | 2014-10-29T09:04:17Z | |
dc.date.issued | 2014 | |
dc.identifier.issn | 1126-6708 | |
dc.identifier.uri | http://hdl.handle.net/11250/2627278 | |
dc.description.abstract | The low-energy and low-momentum dynamics of systems with a spontaneously broken continuous symmetry is dominated by the ensuing Nambu-Goldstone bosons. It can be conveniently encoded in a model-independent effective field theory whose structure is fixed by symmetry up to a set of effective coupling constants. We construct the most general effective Lagrangian for the Nambu-Goldstone bosons of spontaneously broken global internal symmetry up to fourth order in derivatives. Rotational invariance and spatial dimensionality of one, two or three are assumed in order to obtain compact explicit expressions, but our method is completely general and can be applied without modifications to condensed matter systems with a discrete space group as well as to higher-dimensional theories. The general low-energy effective Lagrangian for relativistic systems follows as a special case. We also discuss the effects of explicit symmetry breaking and classify the corresponding terms in the Lagrangian. Diverse examples are worked out in order to make the results accessible to a wide theoretical physics community. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Springer Verlag | nb_NO |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Effective Lagrangians for quantum many-body systems | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.volume | 2014 | nb_NO |
dc.source.journal | Journal of High Energy Physics (JHEP) | nb_NO |
dc.source.issue | 8 | nb_NO |
dc.identifier.doi | 10.1007/JHEP08(2014)088 | |
dc.identifier.cristin | 1167870 | |
dc.description.localcode | © The Author(s) 2014 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. | nb_NO |
cristin.unitcode | 194,66,20,0 | |
cristin.unitname | Institutt for fysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |