First verification of generic fidelity recovery in a dynamical system
  We study the time evolution of fidelity in a dynamical many body system, namely a kicked Ising model, modified to allow for a time reversal invariance breaking. We find good agreement with the random matrix predictions in the realm of strong perturbations. In particular for the time-reversal symmetry breaking case the predicted revival at Heisenberg time is clearly seen. 
Carlos Pineda, Rudi Schaefer, Tomaz Prosen, Thomas H. Seligman