Some recent results in scalar quantum field theory in globally hyperbolic asymptotically flat spacetimes
arXiv:gr-qc/0611125
Abstract
Some recent results obtained by the author and collaborators about QFT in asymptotically flat spacetimes at null infinity are summarized and reviewed. In particular it is focused on the physical properties of ground states in the bulk induced by the BMS-invariant state defined at null infinity.
10 pages, 2 figures, invited plenary talk at the XVII SIGRAV Conference held in Torino, September 4-7, 2006