耿浩博士学术报告
Title: Entanglement Islands in Braneworld
Speaker: Hao GENG（耿浩）
Affiliation: Harvard University
Time: 10:00-11:00, Tuesday, 17th May, 2022 (UTC+8, Beijing Time)
Venue：Zoom Meeting
Inviter: Qiang WEN（文强）
Abstract
Entanglement island is the recently emergent concept in quantum gravity. It plays an essential role in resolving the black hole information paradox. However, existing calculable models of entanglement islands are mainly in two dimensional toy models of quantum gravity for which there are no local graviton modes. In order to search for entanglement island and study its properties in higher dimensions, we will use the Karch-Randall braneworld. This theory is doubly holographic and we can perform explicit calculations locating the entanglement islands using holography. We will formulate a version of the black hole information paradox in the Karch-Randall braneworld and see how entanglement island helps us to resolve this paradox. Our calculation is performed in a simple case of Karch-Randall braneworld and it is purely analytic. Interestingly, the gravitational theory localized on the Karch-Randall brane is massive and this is due to the fact that the brane is coupled to a bath which violates the energy-momentum conservation on the brane and the mass of the graviton is therefore a one-loop quantum effect. Based on this observation, we will formulate a conjecture that entanglement islands exist only in massive gravity theories. If time is allowed we will briefly discuss our further study of this conjecture and the proof of it in a large class of spacetimes including asymptotically anti-de Sitter spacetimes.
About the Speaker
耿浩，博士毕业于华盛顿大学西雅图分校，现为哈佛大学物理系博士后研究员，近期研究兴趣为量子引力。
The seminar will be broadcasted online by Zoom.
Interested people are free to join, without registration in advance.
The Zoom info is
URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09
Meeting ID: 385 442 0225
Passcode: yauc