An explicit categorical construction of instanton density in lattice Yang-Mills theory
Abstract Since the inception of lattice QCD, a natural definition for the Yang-Mills instanton on lattice has been long sought for. In a recent work [1], one of authors showed the natural solution has to be organized in terms of bundle gerbes in higher homotopy theory / higher category theory, and i...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP06(2025)085 |
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| author | Peng Zhang Jing-Yuan Chen |
| author_facet | Peng Zhang Jing-Yuan Chen |
| author_sort | Peng Zhang |
| collection | DOAJ |
| description | Abstract Since the inception of lattice QCD, a natural definition for the Yang-Mills instanton on lattice has been long sought for. In a recent work [1], one of authors showed the natural solution has to be organized in terms of bundle gerbes in higher homotopy theory / higher category theory, and introduced the principles for such a categorical construction. To pave the way towards actual numerical implementation in the near future, nonetheless, an explicit construction is necessary. In this paper we provide such an explicit construction for SU(2) gauge theory, with technical aspects inspired by Lüscher’s 1982 geometrical construction [2]. We will see how the latter is in a suitable sense a saddle point approximation to the full categorical construction. The generalization to SU(N) will be discussed. The construction also allows for a natural definition of lattice Chern-Simons-Yang-Mills theory in three spacetime dimensions. |
| format | Article |
| id | doaj-art-c95bc9df602a44d2904acc2cdffb0101 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-c95bc9df602a44d2904acc2cdffb01012025-08-20T03:42:37ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025613510.1007/JHEP06(2025)085An explicit categorical construction of instanton density in lattice Yang-Mills theoryPeng Zhang0Jing-Yuan Chen1Institute for Advanced Study, Tsinghua UniversityInstitute for Advanced Study, Tsinghua UniversityAbstract Since the inception of lattice QCD, a natural definition for the Yang-Mills instanton on lattice has been long sought for. In a recent work [1], one of authors showed the natural solution has to be organized in terms of bundle gerbes in higher homotopy theory / higher category theory, and introduced the principles for such a categorical construction. To pave the way towards actual numerical implementation in the near future, nonetheless, an explicit construction is necessary. In this paper we provide such an explicit construction for SU(2) gauge theory, with technical aspects inspired by Lüscher’s 1982 geometrical construction [2]. We will see how the latter is in a suitable sense a saddle point approximation to the full categorical construction. The generalization to SU(N) will be discussed. The construction also allows for a natural definition of lattice Chern-Simons-Yang-Mills theory in three spacetime dimensions.https://doi.org/10.1007/JHEP06(2025)085Lattice QCDLattice Quantum Field TheoryAlgorithms and Theoretical Developments |
| spellingShingle | Peng Zhang Jing-Yuan Chen An explicit categorical construction of instanton density in lattice Yang-Mills theory Journal of High Energy Physics Lattice QCD Lattice Quantum Field Theory Algorithms and Theoretical Developments |
| title | An explicit categorical construction of instanton density in lattice Yang-Mills theory |
| title_full | An explicit categorical construction of instanton density in lattice Yang-Mills theory |
| title_fullStr | An explicit categorical construction of instanton density in lattice Yang-Mills theory |
| title_full_unstemmed | An explicit categorical construction of instanton density in lattice Yang-Mills theory |
| title_short | An explicit categorical construction of instanton density in lattice Yang-Mills theory |
| title_sort | explicit categorical construction of instanton density in lattice yang mills theory |
| topic | Lattice QCD Lattice Quantum Field Theory Algorithms and Theoretical Developments |
| url | https://doi.org/10.1007/JHEP06(2025)085 |
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