A Brownian particle hopping in a symmetric double-well potential can be statistically confined into either well by the action of two periodic input signals that rock the potential simultaneously. The underlying harmonic mixing mechanism exhibits resonant behavior responsible for asymmetry inversion. Asymmetric confinement through harmonic mixing can be conveniently controlled by tuning the input signal parameters (frequencies, relative phase, and amplitudes).

PACS numbers: 05.40.--a, 02.50.Ey, 82.20.--w