Alexandre Belin 博士学术报告
Title: Coherent states, initial data and localizing quantum information in quantum gravity
Speaker: Dr. Alexandre Belin
Affiliation: University of Geneva, Switzerland
Time:16:00-17:00, Tuesday, 25th October, 2022 (UTC+8, Beijing Time)
Inviter: Hai Lin（林海）
Abstract
A common method to prepare states in AdS/CFT is to perform the Euclidean path integral with sources turned on for single-trace operators. These states can be interpreted as coherent states of the bulk quantum theory associated to Lorentzian initial data on a Cauchy slice. In this talk, I will first discuss the extent to which arbitrary initial data can be obtained in this way. I will show that the initial data must be analytic and define the subset of it that can be prepared by imposing bulk regularity. Turning this around, I will show that for generic analytic initial data the corresponding Euclidean section contains singularities coming from delta function sources in the bulk. Time permitted, I will discuss an application of these states: I will argue that they provide a way to localize information in perturbative quantum gravity.
About the Speaker
Alexandre Belin is a Researcher at the Department of Theoretical Physics of University of Geneva in Switzerland.
His research fields of interest include String theory, holography and quantum information.
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