  Motivated by the recent discovery of ergodicity breaking in geometrically
frustrated systems, we study the quench dynamics of interacting hardcore bosons
on a sawtooth ladder. We identify a set of initial states for which this system
exhibits characteristic signatures of localization like initial state memory
retention and slow growth of entanglement entropy for a wide parameter regime.
Remarkably, this localization persists even when the many-body spectrum is
thermalizing. We argue that the localized dynamics originates from an
interaction induced quantum interference. Our results show that the sawtooth
ladder can be a fertile platform for realizing non-equilibrium quantum states
of matter.
