The Holographic Nature of Null Infinity

• Published in: SciPost physics Vol. 10; no. 2; p. 041
• Main Authors: Laddha, Alok, Prabhu, Siddharth, Raju, Suvrat, Shrivastava, Pushkal
• Format: Journal Article
• Language: English
• Published: SciPost 18.02.2021

We argue that, in a theory of quantum gravity in a four dimensional asymptotically flat spacetime, all information about massless excitations can be obtained from an infinitesimal neighbourhood of the past boundary of future null infinity and does not require observations over all of future null inf...