Quantum anomalies and linear response theory

Details Quantum anomalies and linear response theory Quantum anomalies and linear response theory

2010-03-17

arxiv.org/abs/1003.3303v2

J. Phys. A (FTC) 43, 332001 (2010)

Physics

Quantum Physics

8 pages, 2 figures, textual improvements (as in published version)

Scientific paper

10.1088/1751-8113/43/33/332001

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 $\epsilon^2$.

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