Soft gravitons in three dimensions
Abstract We consider quantum gravity with zero cosmological constant in three dimensions. First, we show that pure quantum gravity can be written as a magnetic Carrollian theory living on null infinity, described by Schwarzian-like degrees of freedom. Next, we couple quantum gravity to massless matt...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2025)002 |
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| _version_ | 1849238104121016320 |
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| author | Jordan Cotler Kristan Jensen Stefan Prohazka Max Riegler Jakob Salzer |
| author_facet | Jordan Cotler Kristan Jensen Stefan Prohazka Max Riegler Jakob Salzer |
| author_sort | Jordan Cotler |
| collection | DOAJ |
| description | Abstract We consider quantum gravity with zero cosmological constant in three dimensions. First, we show that pure quantum gravity can be written as a magnetic Carrollian theory living on null infinity, described by Schwarzian-like degrees of freedom. Next, we couple quantum gravity to massless matter. Transition amplitudes exhibit several features that resemble soft graviton physics in four dimensions, despite the absence of a propagating graviton. As in four dimensions, we find three equivalent results: a soft graviton theorem, an infinite-dimensional BMS asymptotic symmetry, and a gravitational memory effect. We also resolve some extant puzzles concerning the partition function and Hilbert space of pure 3d gravity with zero cosmological constant. |
| format | Article |
| id | doaj-art-a4cecd80befe42ea9d4a3444699ba897 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-a4cecd80befe42ea9d4a3444699ba8972025-08-20T04:01:44ZengSpringerOpenJournal of High Energy Physics1029-84792025-07-012025714010.1007/JHEP07(2025)002Soft gravitons in three dimensionsJordan Cotler0Kristan Jensen1Stefan Prohazka2Max Riegler3Jakob Salzer4Department of Physics, Harvard UniversityDepartment of Physics and Astronomy, University of VictoriaUniversity of Vienna, Faculty of Physics, Mathematical PhysicsQuantum Technology Laboratories GmbHUniversité Libre de Bruxelles and International Solvay InstitutesAbstract We consider quantum gravity with zero cosmological constant in three dimensions. First, we show that pure quantum gravity can be written as a magnetic Carrollian theory living on null infinity, described by Schwarzian-like degrees of freedom. Next, we couple quantum gravity to massless matter. Transition amplitudes exhibit several features that resemble soft graviton physics in four dimensions, despite the absence of a propagating graviton. As in four dimensions, we find three equivalent results: a soft graviton theorem, an infinite-dimensional BMS asymptotic symmetry, and a gravitational memory effect. We also resolve some extant puzzles concerning the partition function and Hilbert space of pure 3d gravity with zero cosmological constant.https://doi.org/10.1007/JHEP07(2025)002Field Theories in Higher DimensionsModels of Quantum Gravity |
| spellingShingle | Jordan Cotler Kristan Jensen Stefan Prohazka Max Riegler Jakob Salzer Soft gravitons in three dimensions Journal of High Energy Physics Field Theories in Higher Dimensions Models of Quantum Gravity |
| title | Soft gravitons in three dimensions |
| title_full | Soft gravitons in three dimensions |
| title_fullStr | Soft gravitons in three dimensions |
| title_full_unstemmed | Soft gravitons in three dimensions |
| title_short | Soft gravitons in three dimensions |
| title_sort | soft gravitons in three dimensions |
| topic | Field Theories in Higher Dimensions Models of Quantum Gravity |
| url | https://doi.org/10.1007/JHEP07(2025)002 |
| work_keys_str_mv | AT jordancotler softgravitonsinthreedimensions AT kristanjensen softgravitonsinthreedimensions AT stefanprohazka softgravitonsinthreedimensions AT maxriegler softgravitonsinthreedimensions AT jakobsalzer softgravitonsinthreedimensions |