Holographic BCFT spectra from brane mergers
Abstract We use holography to study the spectra of boundary conformal field theories (BCFTs). To do so, we consider a 2-dimensional Euclidean BCFT with two circular boundaries that correspond to dynamical end-of-the-world branes in 3-dimensional gravity. Interactions between these branes inform the...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-11-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP11(2022)158 |
| _version_ | 1797865737562357760 |
|---|---|
| author | Shovon Biswas Jani Kastikainen Sanjit Shashi James Sully |
| author_facet | Shovon Biswas Jani Kastikainen Sanjit Shashi James Sully |
| author_sort | Shovon Biswas |
| collection | DOAJ |
| description | Abstract We use holography to study the spectra of boundary conformal field theories (BCFTs). To do so, we consider a 2-dimensional Euclidean BCFT with two circular boundaries that correspond to dynamical end-of-the-world branes in 3-dimensional gravity. Interactions between these branes inform the operator content and the energy spectrum of the dual BCFT. As a proof of concept, we first consider two highly separated branes whose only interaction is taken to be mediated by a scalar field. The holographic computation of the scalar-mediated exchange reproduces a light scalar primary and its global descendants in the closed-string channel of the dual BCFT. We then consider a gravity model with point particles. Here, the interaction of two separated branes corresponds to a heavy operator which lies below the black hole threshold. However, we may also consider branes at finite separation that “merge” non-smoothly. Such brane mergers can be used to describe unitary sub-threshold boundary-condition-changing operators in the open-string spectrum of the BCFT. We also find a new class of sub-threshold Euclidean bra-ket wormhole saddles with a factorization puzzle for closed-string amplitudes. |
| first_indexed | 2024-04-09T23:12:59Z |
| format | Article |
| id | doaj.art-5336d9d61ebc4899b342ccd04f3b3636 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-09T23:12:59Z |
| publishDate | 2022-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-5336d9d61ebc4899b342ccd04f3b36362023-03-22T10:15:14ZengSpringerOpenJournal of High Energy Physics1029-84792022-11-0120221116810.1007/JHEP11(2022)158Holographic BCFT spectra from brane mergersShovon Biswas0Jani Kastikainen1Sanjit Shashi2James Sully3Department of Physics and Astronomy, University of British ColumbiaDepartment of Physics, University of HelsinkiTheory Group, Weinberg Institute, Department of Physics, University of TexasDepartment of Physics and Astronomy, University of British ColumbiaAbstract We use holography to study the spectra of boundary conformal field theories (BCFTs). To do so, we consider a 2-dimensional Euclidean BCFT with two circular boundaries that correspond to dynamical end-of-the-world branes in 3-dimensional gravity. Interactions between these branes inform the operator content and the energy spectrum of the dual BCFT. As a proof of concept, we first consider two highly separated branes whose only interaction is taken to be mediated by a scalar field. The holographic computation of the scalar-mediated exchange reproduces a light scalar primary and its global descendants in the closed-string channel of the dual BCFT. We then consider a gravity model with point particles. Here, the interaction of two separated branes corresponds to a heavy operator which lies below the black hole threshold. However, we may also consider branes at finite separation that “merge” non-smoothly. Such brane mergers can be used to describe unitary sub-threshold boundary-condition-changing operators in the open-string spectrum of the BCFT. We also find a new class of sub-threshold Euclidean bra-ket wormhole saddles with a factorization puzzle for closed-string amplitudes.https://doi.org/10.1007/JHEP11(2022)158AdS-CFT CorrespondenceBrane Dynamics in Gauge TheoriesScale and Conformal Symmetries |
| spellingShingle | Shovon Biswas Jani Kastikainen Sanjit Shashi James Sully Holographic BCFT spectra from brane mergers Journal of High Energy Physics AdS-CFT Correspondence Brane Dynamics in Gauge Theories Scale and Conformal Symmetries |
| title | Holographic BCFT spectra from brane mergers |
| title_full | Holographic BCFT spectra from brane mergers |
| title_fullStr | Holographic BCFT spectra from brane mergers |
| title_full_unstemmed | Holographic BCFT spectra from brane mergers |
| title_short | Holographic BCFT spectra from brane mergers |
| title_sort | holographic bcft spectra from brane mergers |
| topic | AdS-CFT Correspondence Brane Dynamics in Gauge Theories Scale and Conformal Symmetries |
| url | https://doi.org/10.1007/JHEP11(2022)158 |
| work_keys_str_mv | AT shovonbiswas holographicbcftspectrafrombranemergers AT janikastikainen holographicbcftspectrafrombranemergers AT sanjitshashi holographicbcftspectrafrombranemergers AT jamessully holographicbcftspectrafrombranemergers |