Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-dot lithium in strong-interaction regime: Depolarization of
  electron spins by magnetic field   Magnetic field usually leads to a polarization of electron spins. It is shown
that in a system of {\em strongly interacting} particles applying magnetic
field may lead to an opposite effect -- depolarization of electron spins.
Results of the work are based on an exact-diagonalization study of quantum-dot
lithium -- a system of three Coulomb interacting two-dimensional electrons in a
parabolic confinement potential.

11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
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
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn