Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An efficient localized basis set for quantum Monte Carlo calculations on
  condensed matter   We present an efficient scheme for representing many-body wavefunctions in
quantum Monte Carlo (QMC) calculations. The scheme is based on B-splines (blip
functions), which consist of localized cubic splines centred on the points of a
regular grid. We show that blip functions are unbiased, systematically
improvable, and conveniently obtained from any standard plane-waves density
functional theory (PW-DFT) code, and therefore provide a convenient and natural
interface between PW-DFT and QMC calculations. We present tests on a 16-atom
system of Si in the $\beta$-tin structure, and on 2- and 8- atoms systems of
MgO in the NaCl structure. We show that already with such small systems the
speed-up of blip functions with respect to plane-waves is between one and two
order of magnitudes, without compromising the accuracy.

10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat