The Holographic Nature of Null Infinity

  title={The Holographic Nature of Null Infinity},
  author={Alok Laddha and Siddharth G. Prabhu and S. Raju and Pushkal Shrivastava},
  journal={arXiv: High Energy Physics - Theory},
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 infinity. Moreover, all information about the state that can be obtained through observations near a cut of future null infinity can also be obtained from observations near any earlier cut although the… 

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