  Quantum many-body scars, long-lived excited states of correlated quantum
chaotic systems that evade thermalization, are of great fundamental and
technological interest. We create novel scar states in a bosonic 1D quantum gas
of dysprosium by stabilizing a super-Tonks-Girardeau gas against collapse and
thermalization with repulsive long-range dipolar interactions. Stiffness and
energy density measurements show that the system is dynamically stable
regardless of contact interaction strength. This enables us to cycle contact
interactions from weakly to strongly repulsive, then strongly attractive, and
finally weakly attractive. We show that this cycle is an energy-space
topological pump (due to a quantum holonomy). Iterating this cycle offers an
unexplored topological pumping method to create a hierarchy of quantum
many-body scar states.
