The entropy of radiation for local quenches in higher dimensions
Abstract We investigate the real time dynamics of the radiation produced by a local quench in a d-dimensional conformal field theory (CFT) with d > 2. Using the interpretation of the higher-dimensional twist operator as a conformal defect, we study the time evolution of the entanglement entropy o...
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| Format: | Article |
| Language: | English |
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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)038 |
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| author | Lorenzo Bianchi Andrea Mattiello Jacopo Sisti |
| author_facet | Lorenzo Bianchi Andrea Mattiello Jacopo Sisti |
| author_sort | Lorenzo Bianchi |
| collection | DOAJ |
| description | Abstract We investigate the real time dynamics of the radiation produced by a local quench in a d-dimensional conformal field theory (CFT) with d > 2. Using the interpretation of the higher-dimensional twist operator as a conformal defect, we study the time evolution of the entanglement entropy of the radiation across a spherical entangling surface. We provide an analytic estimate for the early- and late-time behavior of the entanglement entropy and derive an upper bound valid at all times. We extend our analysis to the case of a boundary CFT (BCFT) and derive similar results through a detailed discussion of the setup with two conformal defects (the boundary and the twist operator). We conclude with a holographic analysis of the process, computing the time evolution of the holographic entanglement entropy (HEE) as the area of the Ryu-Takayanagi surface in a backreacted geometry. This gives a Page-like curve in agreement with the early- and late-time results obtained with CFT methods. The extension to a holographic BCFT setup is generically hard and we consider the case of a tensionless end-of-the-world brane. |
| format | Article |
| id | doaj-art-2eabfc0920574e3a814f7a234df63646 |
| 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-2eabfc0920574e3a814f7a234df636462025-08-20T04:01:42ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025614810.1007/JHEP06(2025)038The entropy of radiation for local quenches in higher dimensionsLorenzo Bianchi0Andrea Mattiello1Jacopo Sisti2Dipartimento di Fisica, Università di TorinoDipartimento di Fisica, Università di TorinoDepartment of Physics and Astronomy, Uppsala UniversityAbstract We investigate the real time dynamics of the radiation produced by a local quench in a d-dimensional conformal field theory (CFT) with d > 2. Using the interpretation of the higher-dimensional twist operator as a conformal defect, we study the time evolution of the entanglement entropy of the radiation across a spherical entangling surface. We provide an analytic estimate for the early- and late-time behavior of the entanglement entropy and derive an upper bound valid at all times. We extend our analysis to the case of a boundary CFT (BCFT) and derive similar results through a detailed discussion of the setup with two conformal defects (the boundary and the twist operator). We conclude with a holographic analysis of the process, computing the time evolution of the holographic entanglement entropy (HEE) as the area of the Ryu-Takayanagi surface in a backreacted geometry. This gives a Page-like curve in agreement with the early- and late-time results obtained with CFT methods. The extension to a holographic BCFT setup is generically hard and we consider the case of a tensionless end-of-the-world brane.https://doi.org/10.1007/JHEP06(2025)038AdS-CFT CorrespondenceGauge-Gravity CorrespondenceScale and Conformal Symmetries |
| spellingShingle | Lorenzo Bianchi Andrea Mattiello Jacopo Sisti The entropy of radiation for local quenches in higher dimensions Journal of High Energy Physics AdS-CFT Correspondence Gauge-Gravity Correspondence Scale and Conformal Symmetries |
| title | The entropy of radiation for local quenches in higher dimensions |
| title_full | The entropy of radiation for local quenches in higher dimensions |
| title_fullStr | The entropy of radiation for local quenches in higher dimensions |
| title_full_unstemmed | The entropy of radiation for local quenches in higher dimensions |
| title_short | The entropy of radiation for local quenches in higher dimensions |
| title_sort | entropy of radiation for local quenches in higher dimensions |
| topic | AdS-CFT Correspondence Gauge-Gravity Correspondence Scale and Conformal Symmetries |
| url | https://doi.org/10.1007/JHEP06(2025)038 |
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