A New Exact Method for Dynamical Fermion Computations with Non-Local   Actions
  We introduce a new algorithm which we call the {Rational Hybrid Monte Carlo} Algorithm (RHMC). This method uses a rational approximation to the fermionic kernel together with a noisy Kennedy-Kuti acceptance step to give an efficient algorithm with no molecular dynamics integration step-size errors. 
Ivan Horvath, A. D. Kennedy and Stefan Sint