Comment on the Quantum Brachistochrone Problem
  In this brief comment we attempt to clarify the apparent discrepancy between the papers [1] and [2] on the quantum brachistochrone, namely whether it is possible to use a judicious mixture of Hermitian and non-Hermitian quantum mechanics to evade the standard lower limit on the time taken for evolution by a Hermitian Hamiltonian with given energy dispersion between two given states. 
C. M. Bender, D. C. Brody, H. F. Jones and B. K. Meister