Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PDFs in small boxes   PDFs can be studied directly using lattice QCD by evaluating matrix elements
of non-local operators. A number of groups are pursuing numerical calculations
and investigating possible systematic uncertainties. One systematic that has
received less attention is the effect of calculating in a finite spacetime
volume. Here we present first attempts to assess the role of the finite volume
for spatially non-local operators. We find that these matrix elements may
suffer from large finite-volume artifacts and more careful investigation is
needed.

15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys