Speaker
Description
The holographic correspondence predicts that certain strongly coupled
quantum systems describe an emergent, higher-dimensional bulk spacetime
in which excitations enjoy local dynamics. We consider a general
holographic state dual to an asymptotically AdS bulk spacetime, and
study boundary correlation functions of local fields integrated against
wavepackets. We derive a factorization formula showing that when the
wavepackets suitably meet at a common bulk point, the boundary
correlators develop sharp features controlled by flat-space-like bulk
scattering processes. These features extend along boundary hyperboloids
whose shape naturally reveals the bulk geometry. We discuss different
choices of operator ordering, which lead to inclusive and
out-of-time-ordered amplitudes, as well as fields of various spins and
masses.
