Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin Polarization of the Low Density 3D Electron Gas   To determine the state of spin polarization of the 3D electron gas at very
low densities and zero temperature, we calculate the energy versus spin
polarization using Diffusion Quantum Monte Carlo methods with backflow
wavefunctions and twist averaged boundary conditions. We find a second order
phase transition to a partially polarized phase at r_s = 50 \pm 2. The magnetic
transition temperature is estimated using an effective mean field method, the
Stoner model.

33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex