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High Energy Theory artwork
September 18, 20232:00 pm – 3:00 pm (CDT)

Symmetry, Soft Dynamics and Holography in Asymptotically Flat Spacetimes


Daniel Kapec (Harvard University)



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

Despite our detailed understanding of holography in Anti-de Sitter space, flat space holography remains somewhat mysterious. “Celestial CFT” is one approach to the subject which attempts to recast quantum gravity in (d+2)-dimensional asymptotically flat spacetimes in terms of a d-dimensional Euclidean CFT residing at the conformal boundary. I will discuss certain universal aspects of this correspondence. As in Anti-de Sitter space, bulk gravitons produce a boundary stress tensor, and bulk gluons furnish boundary conserved currents. I will also show that continuous spaces of vacua in the bulk map directly onto the conformal manifold of the boundary CFT. This correspondence provides a new perspective on the role of the BMS group in flat space holography, and offers a new interpretation of the antisymmetric double-soft gluon theorem in terms of the curvature of an infinite-dimensional vacuum manifold.

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