  Super Efimov effect is a recently proposed three-body effect characterized by
a double-exponential scaling, which has not been observed experimentally yet.
Here, we present the general dynamic equations determining the cloud size of a
scale invariant quantum gas in a time dependent harmonic trap. We show that a
double-log periodicity as the hallmark of the super Efimov effect emerges when
the trap frequency is decreased with a specially designed time-dependence. We
also demonstrate that this dynamic super Efimov effect can be realized with
realistic choices of parameters in current experiments.
