Classification of generalised higher-order Einstein-Maxwell Lagrangians
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arXiv
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911773363273728 |
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| author | Colléaux, Aimeric Langlois, David Noui, Karim |
| author_facet | Colléaux, Aimeric Langlois, David Noui, Karim |
| contents | We classify all higher-order generalised Einstein-Maxwell Lagrangians that include terms linear in the curvature tensor and quadratic in the derivatives of the electromagnetic field strength tensor. Using redundancies due to the Bianchi identities, dimensionally dependent identities and boundary terms, we show that a general Lagrangian of this form can always be reduced to a linear combination of only 21 terms, with coefficients that are arbitrary functions of the two scalar invariants derived from the field strength. We give an explicit choice of basis where these 21 terms include 3 terms linear in the Riemann tensor and 18 terms quadratic in the derivatives of the field strength. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_14814 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Classification of generalised higher-order Einstein-Maxwell Lagrangians Colléaux, Aimeric Langlois, David Noui, Karim General Relativity and Quantum Cosmology High Energy Physics - Theory We classify all higher-order generalised Einstein-Maxwell Lagrangians that include terms linear in the curvature tensor and quadratic in the derivatives of the electromagnetic field strength tensor. Using redundancies due to the Bianchi identities, dimensionally dependent identities and boundary terms, we show that a general Lagrangian of this form can always be reduced to a linear combination of only 21 terms, with coefficients that are arbitrary functions of the two scalar invariants derived from the field strength. We give an explicit choice of basis where these 21 terms include 3 terms linear in the Riemann tensor and 18 terms quadratic in the derivatives of the field strength. |
| title | Classification of generalised higher-order Einstein-Maxwell Lagrangians |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2312.14814 |