On the space of 2d integrable models

Abstract We study infinite dimensional Lie algebras, whose infinite dimensional mutually commuting subalgebras correspond with the symmetry algebra of 2d integrable models. These Lie algebras are defined by the set of infinitesimal, nonlinear, and higher derivative symmetry transformations present i...

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Main Author: Lukas W. Lindwasser
Format: Article
Language:English
Published: SpringerOpen 2025-01-01
Series:Journal of High Energy Physics
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Online Access:https://doi.org/10.1007/JHEP01(2025)138
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author Lukas W. Lindwasser
author_facet Lukas W. Lindwasser
author_sort Lukas W. Lindwasser
collection DOAJ
description Abstract We study infinite dimensional Lie algebras, whose infinite dimensional mutually commuting subalgebras correspond with the symmetry algebra of 2d integrable models. These Lie algebras are defined by the set of infinitesimal, nonlinear, and higher derivative symmetry transformations present in theories with a left(right)-moving or (anti)-holomorphic current. We study a large class of such Lagrangian theories. We study the commuting subalgebras of the 2d free massless scalar, and find the symmetries of the known integrable models such as sine-Gordon, Liouville, Bullough-Dodd, and Korteweg-de Vries. Along the way, we find several new sequences of commuting charges, which we conjecture are charges of integrable models which are new deformations of a single scalar. After quantizing, the Lie algebra is deformed, and so are their commuting subalgebras.
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spelling doaj-art-6309a0bd020c40e7ac59f530f31bfa132025-02-09T12:07:47ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025114710.1007/JHEP01(2025)138On the space of 2d integrable modelsLukas W. Lindwasser0Mani L. Bhaumik Institute for Theoretical Physics, Department of Physics and Astronomy, University of CaliforniaAbstract We study infinite dimensional Lie algebras, whose infinite dimensional mutually commuting subalgebras correspond with the symmetry algebra of 2d integrable models. These Lie algebras are defined by the set of infinitesimal, nonlinear, and higher derivative symmetry transformations present in theories with a left(right)-moving or (anti)-holomorphic current. We study a large class of such Lagrangian theories. We study the commuting subalgebras of the 2d free massless scalar, and find the symmetries of the known integrable models such as sine-Gordon, Liouville, Bullough-Dodd, and Korteweg-de Vries. Along the way, we find several new sequences of commuting charges, which we conjecture are charges of integrable models which are new deformations of a single scalar. After quantizing, the Lie algebra is deformed, and so are their commuting subalgebras.https://doi.org/10.1007/JHEP01(2025)138Integrable Field TheoriesIntegrable HierarchiesHigher Spin Symmetry
spellingShingle Lukas W. Lindwasser
On the space of 2d integrable models
Journal of High Energy Physics
Integrable Field Theories
Integrable Hierarchies
Higher Spin Symmetry
title On the space of 2d integrable models
title_full On the space of 2d integrable models
title_fullStr On the space of 2d integrable models
title_full_unstemmed On the space of 2d integrable models
title_short On the space of 2d integrable models
title_sort on the space of 2d integrable models
topic Integrable Field Theories
Integrable Hierarchies
Higher Spin Symmetry
url https://doi.org/10.1007/JHEP01(2025)138
work_keys_str_mv AT lukaswlindwasser onthespaceof2dintegrablemodels