On Quantum Integrable Systems
  Many quantum integrable systems are obtained using an accelerator physics technique known as Ermakov (or normalized variables) transformation. This technique was used to create classical nonlinear integrable lattices for accelerators and nonlinear integrable plasma traps. Now, all classical results are carried over to a nonrelativistic quantum case. 
Viatcheslav Danilov and Sergei Nagaitsev
quant-ph physics.acc-ph