ENERGY DIFFUSION IN STRONGLY DRIVEN QUANTUM CHAOTIC SYSTEMS
Elyutin P.V.

Received: June 21, 2005

PACS: 05.45.-a, 42.50.Hz

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The energy evolution of a quantum chaotic system under the perturbation that harmonically depends on time is studied in the case of a large perturbation, in which the transition rate calculated from the Fermi golden rule exceeds the frequency of the perturbation. It is shown that the energy evolution retains its diffusive character, with the diffusion coefficient that is asymptotically proportional to the magnitude of the perturbation and to the square root of the density of states. The results are supported by numerical calculation. Energy absorption by the system and quantum-classical correlations are discussed.