A quantum Monte-Carlo method for fermions, free of discretization errors
arXiv:cond-mat/9805255 · doi:10.1103/PhysRevLett.82.4155
Abstract
In this work we present a novel quantum Monte-Carlo method for fermions, based on an exact decomposition of the Boltzmann operator $exp(-βH)$. It can be seen as a synthesis of several related methods. It has the advantage that it is free of discretization errors, and applicable to general interactions, both for ground-state and finite-temperature calculations. The decomposition is based on low-rank matrices, which allows faster calculations. As an illustration, the method is applied to an analytically solvable model (pairing in a degenerate shell) and to the Hubbard model.
5 pages, 4 figures, submitted to Phys. Rev. Lett