Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of the d_{x^2-y^2} pairing correlation in the
  two-dimensional Hubbard model: a quantum Monte Carlo study   Quantum Monte Carlo is used to investigate the possibility of d_{x^2-y^2}
superconductivity in the two-dimensional repulsive Hubbard model. A small
energy scale relevant to possible pairing requires a care (i.e., sufficiently
small level separation between the $k$ points $(\delta k,\pi-\delta k')$ and
$(\pi-\delta k'',\delta k''')$ with small $\delta k$'s) to detect enhanced
correlations in finite-size studies, as motivated from a previous study on
Hubbard ladders. Our calculation indeed detects long-tailed enhancements in the
d_{x^2-y^2} pairing correlation when the system is near, but not exactly at,
half-filling.

10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org