We start by revisiting the task of constructing a holographic dual to quantum gravity in asymptotically flat spacetimes. Upon recasting the S-matrix in terms of data at the conformal boundary, we see that the two standard approaches amount to slicing up the bulk and boundary in different ways.

The Celestial Hologram organizes scattering from the point of view of Rindler evolution. We identify its advantages for extracting and enforcing enhanced symmetries of quantum gravity. Taking radial = Rindler evolution provides a shorter path to the standard soft theorem = Ward identity connection, and a more familiar relation between bulk and boundary symmetry generators. At the same time, it shows that the state of the Rindler horizon determines the state in the 2D CCFT Hilbert space. (Based on 2201.06805)

Meanwhile, in AdS/CFT we expect the Rindler horizon to represent a strongly coupled system exhibiting maximal quantum chaos. This leads to many fun questions for us to ponder. Can we see such signals in CCFT? What features should we demand of a toy model for the conformally soft sector? Can we build one? (Based on 2201.01630 and 2201.05054 with H. Verlinde)

We close with a discussion of recent exciting developments to the Celestial Canon. (Based on CH'22 [https://pcts.online)]https://pcts.online)

https://princeton.zoom.us/j/97195348538?pwd=bEhjczRmbnNIZjNydFpYQXN0bXZ…