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A K-contact Lagrangian formulation for nonconservative field theories
dc.contributor.author | Gaset Rifà, Jordi |
dc.contributor.author | Gràcia Sabaté, Francesc Xavier |
dc.contributor.author | Muñoz Lecanda, Miguel Carlos |
dc.contributor.author | Rivas Guijarro, Xavier |
dc.contributor.author | Román Roy, Narciso |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Matemàtiques |
dc.contributor.other | Universitat Politècnica de Catalunya. Doctorat en Matemàtica Aplicada |
dc.date.accessioned | 2022-04-12T09:23:38Z |
dc.date.available | 2023-06-02T00:27:18Z |
dc.date.issued | 2021-06-01 |
dc.identifier.citation | Gaset, J. [et al.]. A K-contact Lagrangian formulation for nonconservative field theories. "Reports on mathematical physics", 1 Juny 2021, vol. 87, núm. 3, p. 347-368. |
dc.identifier.issn | 0034-4877 |
dc.identifier.other | https://arxiv.org/pdf/2002.10458.pdf |
dc.identifier.uri | http://hdl.handle.net/2117/365729 |
dc.description.abstract | Dynamical systems with dissipative behaviour can be described in terms of contact manifolds and a modified version of Hamilton's equations. Dissipation terms can also be added to field equations, as showed in a recent paper where we introduced the notion of k-contact structure, and obtained a modified version of the De Donder–Weyl equations of covariant Hamiltonian field theory. In this paper we continue this study by presenting a k-contact Lagrangian formulation for nonconservative field theories. The Lagrangian density is defined on the product of the space of k-velocities times a k-dimensional Euclidean space with coordinates sa, which are responsible for the dissipation. We analyze the regularity of such Lagrangians; only in the regular case we obtain a k-contact Hamiltonian system. We study several types of symmetries for k-contact Lagrangian systems, and relate them with dissipation laws, which are analogous to conservation laws of conservative systems. Several examples are discussed: we find contact Lagrangians for some kinds of second-order linear partial differential equations, with the damped membrane as a particular example, and we also study a vibrating string with a magnetic-like term. |
dc.description.sponsorship | Financial support from the Secretary of University and Research of the Ministry of Business and Knowledge of the Catalan Government project 2017–SGR–932. |
dc.format.extent | 22 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject.lcsh | Field theory (Physics) |
dc.title | A K-contact Lagrangian formulation for nonconservative field theories |
dc.type | Article |
dc.subject.lemac | Camps, Teoria dels (Física) |
dc.contributor.group | Universitat Politècnica de Catalunya. GEOMVAP - Geometria de Varietats i Aplicacions |
dc.identifier.doi | 10.1016/S0034-4877(21)00041-0 |
dc.description.peerreviewed | Peer Reviewed |
dc.subject.ams | Classificació AMS::70 Mechanics of particles and systems::70S Classical field theories |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/abs/pii/S0034487721000410 |
dc.rights.access | Open Access |
local.identifier.drac | 32013186 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-098265-B-C33/ES/GEOMETRIA-FISICA-CONTROL Y APLICACIONES/ |
local.citation.author | Gaset, J.; Gràcia, Xavier; Muñoz-Lecanda, Miguel C.; Rivas, X.; Roman-Roy, N. |
local.citation.publicationName | Reports on mathematical physics |
local.citation.volume | 87 |
local.citation.number | 3 |
local.citation.startingPage | 347 |
local.citation.endingPage | 368 |
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