S. Chandrasekharan, *NOVEL QUANTUM MONTE CARLO ALGORITHMS FOR FERMIONS*,
in Quantum Monte Carlo: Recent Advances and Common Problems in
Condensed Matter Physics and Field Theory, edited by M. Compostrini, M.P. Lomardo and F. Paderiva
(2001), EDIZIONI ETS .
**Abstract:**

*Recent research shows that the partition function for a
class of models involving fermions can be written as a
statistical mechanics of clusters with positive definite
weights. This new representation of the model allows one to
construct novel algorithms. We illustrate this through
models consisting of fermions with and without spin. A
Hubbard type model with both attractive and repulsive
interactions becomes tractable using the new approach.
Precision results in the two dimensional attractive model
confirm a superfluid phase transition in the
Kosterlitz-Thouless universality class.*