QG group meeting: tunneling and complex trajectories

This is the weekly QG group meeting.
Speaker: Jake Barnett (visiting Ph.D. student in QG group).
Title: The correspondence between tunneling and complex classical trajectories.

Quantum tunneling is not quantum. Rather, a tunneling process can be described by a (complex) classical trajectory. We discuss the derivation of this correspondence, as well as showing off some new results. In particular, we discuss how this method contains the Euclidean Instanton as a special case, and how to select the appropriate complex trajectory from an infinitude of saddle points to the path integral.