Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loop updates for quantum Monte Carlo simulations in the canonical
  ensemble   We present a new non-local updating scheme for quantum Monte Carlo
simulations, which conserves particle number and other symmetries. It allows
exact symmetry projection and direct evaluation of the equal-time Green's
function and other observables in the canonical ensemble. The method is applied
to bosonic atoms in optical lattices, neutron pairs in atomic nuclei and
electron pairs in ultrasmall superconducting grains.

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg