  Wang and Landau proposed recently, a simple and flexible non-Boltzmann Monte
Carlo method for estimating the density of states, from which the macroscopic
properties of a closed system can be calculated. They demonstrated their
algorithm by cocontinuous energy spectrum. We propose in this paper
modifications nsidering systems with discrete energy spectrum. We find that the
Wang-Landau algorithm does not perform well when the system has continuous
energy spectrum. We propose in this paper modifications to the algorithm and
demonstrate their performance on a lattice model of liquid crystalline system
(with Lebwohl-Lasher interaction having continuously varying energy),
exhibiting transition from high temperature isotropic to low temperature
nematic phase.
