Bichromatically driven double well: Parametric perspective of the control landscape

We numerically construct and study the control landscape of a $(\omega,2\omega)$ bichromatically driven double well in the presence of strong fields. The control landscape is obtained by correlating the overlap intensities between the floquet states and an initial phase space coherent state with the parametric motion of the quasienergies {\it i.e.,} intensity-level velocity correlator. "Walls" of no control, robust under variations of the relative phase between the fields, are seen in the control landscape and associated with multilevel interactions involving chaotic floquet states.