Numerical Test of Born-Oppenheimer Approximation in Chaotic Systems
  We study the validity of the Born-Oppenheimer approximation in chaotic dynamics. Using numerical solutions of autonomous Fermi accelerators, we show that the general adiabatic conditions can be interpreted as the narrowness of the chaotic region in phase space. 
Jeong-Bo Shim, Mahir S. Hussein, Martina Hentschel