Physics Seminar
Speaker: Siddharth Prabhu, CMI
Date: Thursday, 17 April 2025
Time: 2.00 to 3.15 PM
Venue: Lecture Hall 5
Information on the boundaries of asymptotically flat spacetimes (part-2)
Siddharth Prabhu
Chennai Mathematical Institute.
17-04-25

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Abstract

Consider any isolated region of the universe as our object of study. If we wish to predict the future of this region and postdict its past, we might expect that we will need to make observations everywhere in this region. However, recently, we have come to suspect a radical departure from this expectation. In this talk, I will provide an accessible introduction to the idea that all the information in any such region could be available to observers who are only on its boundary. Dynamical information about interactions occurring in the region is also seen to be encoded in the boundary correlators. We describe our progress towards making the computation of such correlators directly in position space tractable. We find that all correlators can be cast as if they were coming from the more symmetric conformal field theories. This representation could be used as a new approach to computing observables for non-gravitational processes too, such as those regularly probed in colliders. We are also led to a new principle that organizes the usual approach to such computations via momentum space Feynman diagrams.