Uniform semiclassical approach to fidelity decay: from weak to strong perturbation.

Abstract

We study fidelity decay by a uniform semiclassical approach, in the three perturbation regimes: namely, the perturbative regime, the Fermi golden rule (FGR) regime, and the Lyapunov regime. A semiclassical expression is derived for the fidelity of initial Gaussian wave packets with width of the order sqare root h (h being the effective Planck constant). The… (More)

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@article{Wang2005UniformSA, title={Uniform semiclassical approach to fidelity decay: from weak to strong perturbation.}, author={Wen-ge Wang and Baowen Li}, journal={Physical review. E, Statistical, nonlinear, and soft matter physics}, year={2005}, volume={71 6 Pt 2}, pages={066203} }