Quantum anomalies and linear response theory

The analysis of diffusive energy spreading in quantized chaotic driven systems, leads to a universal paradigm for the emergence of a quantum anomaly. In the classical approximation a driven chaotic system exhibits stochastic-like diffusion in energy space with a coefficient $D$ that is proportional to the intensity $\epsilon^2$ of the driving. In the corresponding quantized problem the coherent transitions are characterized by a generalized Wigner time $t_{\epsilon}$, and a self-generated (intrinsic) dephasing process leads to non-linear dependence of $D$ on $\epsilon^2$.Comment: 8 pages, 2 figures, textual improvements (as in published version

Physical Electronics

Contains reports on three research projects

Physical Electronics

Contains reports on four research projects

Physical Electronics

Contains reports on four research projects

Physical Electronics

Contains reports on three research projects

Physical Electronics

Contains research objectives and reports on four research projects

Physical Electronics

Contains research objectives and reports on two research projects

Physical Electronics

Contains reports on three research projects