  For a homogeneous system divisible into identical, weakly interacting
subsystems, the muticanonical procedure can be accelerated if it is first
applied to determine of the density of states for a single subsystem. This
result is then employed to approximate the state density of a subsystem with
twice the size that forms the starting point of a new multicanonical iteration.
Since this compound subsystem interacts less on average with its environment,
iterating this sequence of steps rapidly generates the state density of the
full system.
