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High Energy Seminar Yasha Neiman

Recent Papers of Yasha Neiman

Description: High Energy Seminar
Speaker: Yasha Neiman (OIST)
Title: Both AdS and CFT from twistor space
Host: Andreas Albrecht
Room: 285
Abstract: We consider one of the simplest holographic models: higher-spin gravity in 4 dimensions vs. a free vector model in 3 dimensions. We present a picture in which both the bulk and boundary local descriptions descend from a unified description in twistor space. Higher-spin gravity is closely tied to the Penrose transform, which relates bulk massless fields to twistor functions. We develop a new geometric perspective on the Penrose transform, whereby it becomes a peculiar representation of a CPT reflection. We then identify a boundary version of the transform, relating twistor functions to bilocal operators and sources in the CFT. This allows us to write the partition function in manifestly higher-spin-covariant language, line by line in the Feynman diagrams. The famous ambiguity in the bulk Penrose transform becomes related to the gauge redundancy in the boundary sources.
Date: Tuesday, March 14, 2017
Time: 4:10pm-5:10pm
Duration: 60 minutes
Access: Public
Created by: High-Energy Seminars
Updated: Monday, February 27, 2017 7:55am
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