Symmetric superfluids
Abstract We present a complete classification of symmetric superfluids, namely shift-symmetric and Poincaré invariant scalar field theories that have an enlarged set of classically conserved currents at leading order in derivatives. These theories arise in the decoupling limit of the effective field...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP06(2019)008 |
| _version_ | 1811333728051396608 |
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| author | Enrico Pajer David Stefanyszyn |
| author_facet | Enrico Pajer David Stefanyszyn |
| author_sort | Enrico Pajer |
| collection | DOAJ |
| description | Abstract We present a complete classification of symmetric superfluids, namely shift-symmetric and Poincaré invariant scalar field theories that have an enlarged set of classically conserved currents at leading order in derivatives. These theories arise in the decoupling limit of the effective field theory of shift-symmetric, single-clock cosmologies and our results pick out all models with couplings fixed by additional symmetry. Remarkably, in D ≥ 2 spacetime dimensions there are only two possibilities: the Dirac-Born-Infeld theory and Scaling Superfluids with Lagrangian (−∂ μ ϕ∂ μ ϕ) α , for some real α. The scaling symmetry present for any α is further enhanced to the full conformal group only for α = D/2, and to infinitely many additional generators for the cuscuton, namely α = 1/2. We discuss the stability of Scaling Superfluids and point out that all coupling constants are determined by the speed of sound. |
| first_indexed | 2024-04-13T16:57:15Z |
| format | Article |
| id | doaj.art-ecac7b3bae20467582c1290b34c204f9 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-13T16:57:15Z |
| publishDate | 2019-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-ecac7b3bae20467582c1290b34c204f92022-12-22T02:38:47ZengSpringerOpenJournal of High Energy Physics1029-84792019-06-012019612510.1007/JHEP06(2019)008Symmetric superfluidsEnrico Pajer0David Stefanyszyn1DAMTP, Centre for Mathematical Sciences, University of CambridgeVan Swinderen Institute for Particle Physics and Gravity, University of GroningenAbstract We present a complete classification of symmetric superfluids, namely shift-symmetric and Poincaré invariant scalar field theories that have an enlarged set of classically conserved currents at leading order in derivatives. These theories arise in the decoupling limit of the effective field theory of shift-symmetric, single-clock cosmologies and our results pick out all models with couplings fixed by additional symmetry. Remarkably, in D ≥ 2 spacetime dimensions there are only two possibilities: the Dirac-Born-Infeld theory and Scaling Superfluids with Lagrangian (−∂ μ ϕ∂ μ ϕ) α , for some real α. The scaling symmetry present for any α is further enhanced to the full conformal group only for α = D/2, and to infinitely many additional generators for the cuscuton, namely α = 1/2. We discuss the stability of Scaling Superfluids and point out that all coupling constants are determined by the speed of sound.http://link.springer.com/article/10.1007/JHEP06(2019)008Effective Field TheoriesGlobal SymmetriesSpace-Time Symmetries |
| spellingShingle | Enrico Pajer David Stefanyszyn Symmetric superfluids Journal of High Energy Physics Effective Field Theories Global Symmetries Space-Time Symmetries |
| title | Symmetric superfluids |
| title_full | Symmetric superfluids |
| title_fullStr | Symmetric superfluids |
| title_full_unstemmed | Symmetric superfluids |
| title_short | Symmetric superfluids |
| title_sort | symmetric superfluids |
| topic | Effective Field Theories Global Symmetries Space-Time Symmetries |
| url | http://link.springer.com/article/10.1007/JHEP06(2019)008 |
| work_keys_str_mv | AT enricopajer symmetricsuperfluids AT davidstefanyszyn symmetricsuperfluids |