KRAMERS EQUATION ALGORITHM WITH KOGUT-SUSSKIND FERMIONS ON LATTICE

We compare the performance of the Kramers equation Monte Carlo (KMC) a lgorithm with that of the Hybrid Monte Carlo (HMC) algorithm for numer ical simulations with dynamical Kogut-Susskind fermions. Using the lat tice Gross-Neveu model in 2 space-time dimensions, we calculate the in tegrated autocorrelation time of different observables at a number of couplings in the scaling region on 16(2) and 32(2) lattices while vary ing the parameters of the algorithms for optimal performance. In our i nvestigation the performance of KMC is always significantly below than that of HMC for the observables used. We also stress the importance o f having a large number of configurations for the accurate estimation of the integrated autocorrelation time. (C) 1998 Published by Elsevier Science B.V. All rights reserved.