Séminaire de Physique Théorique
Celestial Holography from twistor spaceLionel Mason (Oxford)
Friday 26 September 2025 10:00 - Salle des séminaires - 2ème étage - Salle 2290, bâtiment E2
Résumé :
The celestial holography program seeks to find a holographic dual to four-dimensional gravity defined at the null infinity at the boundary of an asymptotically flat space-time. The correlation functions of the dual theory at infinity are meant to compute the scattering amplitudes of the bulk gravity. This talk will review some of the progress and explain how the ideas are tied up with twistor formulations of physical theories, with the celestial symmetries being simply the natural geometric symmetries of twistor space. The twistor formulations of physical theories arising from twists of conventional string theories in twistor space are represented in holomorphic versions of Chern-Simons theories. This is joint work with Adam Kmec, Romain Ruzziconi and Atul Sharma: 2407.04028 and 2506.01888.
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