1204.1747 (Heiner Kohler et al.)

Fidelity and level correlations in the transition from regularity to
chaos    [PDF]

Heiner Kohler, Christian Recher

Mean fidelity amplitude and parametric energy--energy correlations are calculated exactly for a regular system, which is subject to a chaotic random perturbation. It turns out that in this particular case under the average both quantities are identical. The result is compared with the susceptibility of chaotic systems against random perturbations. Regular systems are more susceptible against random perturbations than chaotic ones.

View original: http://arxiv.org/abs/1204.1747