Regarding his take about combining No Boundary proposal with inflation theory (Hawking and Turok), he talks about the "pea instanton".
To my very limited understanding I thought instantons were only for describing quantum tunneling phenomena. The No Boundary proposal doesn't subscribe to this, it just says that the Euclideanized 4-spatial-dimensioned pre-Planck-era universe was always there and there was no t=0?
Or does it actually involve a tunneling process like Vilenkin's?
This post imported from StackExchange Physics at 2014-03-22 16:55 (UCT), posted by SE-user Ocsis2