Fast quantum Monte Carlo on a GPU

Running time: Because of the statistical nature of Monte Carlo calculations, computations may be chained indefinitely to improve statistical accuracy. As an example, using the QL package, the energy of a liquid helium system with 1952 atoms can be computed to within 1 mK per atom in less than 20 min. This corresponds to the relative error of 10−4. It is unlikely that a higher accuracy may be needed.