Control of spatiotemporal disorder in parametrically excited surface waves.
Interacting surface waves, parametrically excited by two commensurate frequencies, yield a number of nonlinear states. Near the system's bicritical point, a state, highly disordered in space and time, results from competition between nonlinear states. Experimentally, this disordered state can be rapidly stabilized to a variety of nonlinear states via open-loop control with a small-amplitude third frequency excitation, whose temporal symmetry governs the temporal and the spatial symmetry of the selected nonlinear state. This technique also excites rapid switching between nonlinear states.
Epstein
T
T
The Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Fineberg
J
J