Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The fermion sign problem: A new decoupling transformation, and a new
  simulation algorithm   We discuss the Fermion sign problem and, by examining a very general
Hubbard-Stratonovich (HS) transformation, argue that the sign problem cannot be
solved with such methods. We propose a different kind of transformation which,
while not solving the sign problem, shows more detailed information about the
system. With our transformation it is {\it trivial} to tell which auxiliary
field configurations give a positive sign and which give a negative sign. We
then discuss briefly various properties of this transformation and construct a
new algorithm which with one simulation gives results for a whole range of
particle densities and Hubbard $U$ values, positive and negative. Our approach
is in excellent agreement with exact calculations.

6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys