Executive Summary : | The study of quantum gravity in asymptotically flat spacetimes has shown that it can be effectively used to study the nature of information storage. The researchers hypothesize that all information, including those of arbitrary bulk excitations, is stored in an intricate way on its boundary. The aim of this project is to investigate this hypothesis and its various consequences, particularly to understand outstanding questions about gravity in flat spacetimes. The researchers argue that in a theory with only massless excitations, an observer at the past boundary of future null infinity has access to all information in the bulk of the spacetime. They also aim to include massive excitations in the boundary description and analyze boundary operators such as the ADM Hamiltonian and the Bondi Mass, which reveal interesting and hitherto unexplored features of gravity. The next aim is to uncover the manner in which this information is stored in the boundary. They are investigating the amount of information stored in the moments of asymptotic charges, both supertranslations and superrotations. They aim to generalize this to all boundary operators and understand the precise expectation values and correlation functions needed to recover specific bulk information. The researchers also aim to address the practical limitations imposed on boundary observations and uncover the mapping between information on the past and future boundaries, which would reveal the rich dynamics of gravitational processes, particularly those involving blackholes. The study of gravity in asymptotically flat spacetimes takes us closer to understanding its nature in our universe and contributes significantly to the fundamental understanding of gravity. |