Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Generic Solution of Fermion Sign Problem   The fermion sign problem, the biggest obstacle in quantum Monte Carlo
calculations, is completely solved in this paper. Here, we find a strategy, in
which the contribution from those negative-weighted paths is thoroughly
cancelled or replaced by some positive-weighted paths. The crucial point lies
on the Feynman path integral formula proposed in our group, which allows us to
deeply analyze the Boltzmann weight of each path. Through mathematical proof,
we demonstrate that physical quantities can be exactly calculated within a
specific wavefunction space, in which all paths have positive Boltzmann weight.
With this finding, a new Monte Carlo method is proposed, in which the fermion
sign problem is absent. As an example, the current method is applied to the
two-dimensional Hubbard model, and the results do manifest the correctness.

28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph