By adding an adjustable phase to the delta-kicked rotor experiment we were able to generate a “flying island” of stability in this classically chaotic system. The results were published here:

Experimental realization of a quantum ratchet through phase modulation

D. H. White, S. K. Ruddell, and M. D. Hoogerland

Phys. Rev. A 88, 063603 – Published 3 December 2013