Speaker
Paolo Benincasa
(MPI Munich)
Description
The physics occurring in an expanding universe is encoded in
correlation functions at his boundary. Part of its structure is
inherited from the probability distributions of the field configuration
at such boundary, or equivalently in the so-called wavefunction of the
universe. I'll review the analytic structure of both the wavefunction
and a certain class of correlation functions, their physical content
their relation and how to compute the latter from the former. I'll
finally discuss a geometrical picture which allows to talk about both
quantities at once and to extract physical information that are obscure
in the standard field theory language.
