End-of-the-world branes in AdS/BCFT
| dc.contributor.author | Uzu, Takahiro | |
| dc.contributor.supervisor | Jensen, Kristan | |
| dc.date.accessioned | 2024-06-18T22:55:56Z | |
| dc.date.available | 2024-06-18T22:55:56Z | |
| dc.date.issued | 2024 | |
| dc.degree.department | Department of Physics and Astronomy | |
| dc.degree.level | Master of Science MSc | |
| dc.description.abstract | We investigate whether simplified models of anti-de Sitter space (AdS) terminated by an end-of-the-world (ETW) brane are a healthy dual to boundary conformal field theory (BCFT). Recent studies have shown that null trajectories starting from AdS boundary traveling to the ETW brane and back to AdS boundary can lead to singularities in the two-point function. Because such singularities do not exist on the BCFT side, they are detrimental to the healthiness of AdS/BCFT duality. We note that these singularities in BCFT two-point functions are unphysical if light takes infinite time to travel from the AdS boundary to the ETW brane in the gravitational dual. Hence, we propose the condition for which the light crossing time between the AdS boundary and the ETW brane takes infinite time as a potential criterion to determine whether a bulk gravitational theory is a healthy dual to a BCFT. In order to justify our proposal, we tested this criterion in several configurations. We first show that simplified models of empty AdS space terminated by an ETW brane do not satisfy this criterion. Then, we uncovered that adding matter in the form of a massive scalar field pushes light crossing time in the healthy direction. Next, the criterion is tested in a known stable solution of non-SUSY Janus to confirm that our criterion is in agreement. Lastly, we embedded ETW branes in three examples of AdS/CFT to see if such configurations could exist. We found a solution, but the ETW brane configurations were unstable, which is supported by our solution not satisfying the light crossing time criterion. | |
| dc.description.scholarlevel | Graduate | |
| dc.identifier.uri | https://hdl.handle.net/1828/16628 | |
| dc.language | English | eng |
| dc.language.iso | en | |
| dc.rights | Available to the World Wide Web | |
| dc.title | End-of-the-world branes in AdS/BCFT | |
| dc.type | Thesis |