Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Path Integral Density Functional Theory   A new method ( PI-DFT ) which combines path integrals and density functional
theory is proposed as a pathway to many fields of physics. Within path integral
theory it is possible to construct particle densities without explicitly
calculating individual wave functions. These densities can directly be used as
an input to energy density functionals. Thus our method makes full use of the
theorem of Hohenberg, Kohn and Sham which shows, that the energy of a many
electron system only depends on the particle density. At glance we present a
recursion formula for the calculation of many fermion and boson particle
densities from one-particle densities at a set of different temperatures. For
both statistics the numerical effort of our method increases only with the
square of the particle number.

19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci