Quantum versus classical dynamics in a periodically driven anharmonic oscillator

Numerical studies of the classical and quantum dynamics of a periodically driven anharmonic oscillator show that the only quasienergy states that are exponentially localized in the field-free energy space are those that are located in the regular region of classical phase space. All the quasienergy states located in the bounded chaotic region in phase space are extended states and do not show the strong quantum limitation of chaos due to the Anderson localization mechanism, which is characteristic of kicked systems.