  Q-balls are bound-state configurations of complex scalars stabilized by a
conserved Noether charge Q. They are solutions to a second-order differential
equation that is structurally identical to Euclidean vacuum-decay bounce
solutions in three dimensions. This enables us to translate the recent
tunneling potential approach to Q-balls, which amounts to a reformulation of
the problem that can simplify the task of finding approximate and even exact
Q-ball solutions.
