Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prediction of the spin triplet two-electron quantum dots in Si: towards
  controlled quantum simulations of magnetic systems   Ground state of two-electron quantum dots in single-valley materials like
GaAs is always a spin singlet regardless of what the potential and interactions
are.
  This statement cannot be generalized to the multi-valley materials like
$n$-doped Si.
  Here we calculate numerically the spectrum of a two-electron Si quantum dot
and show that the dot with the lateral size of several nm can have the spin
triplet ground state which is impossible in the single-valley materials.
  Predicted singlet-triplet level crossing in two-electron Si quantum dots can
potentially establish the platform for quantum simulation of magnetic many body
systems based on quantum dots.
  We suggest several examples of such systems that open a way to controlled
quantum simulations within the condensed matter setting.

2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org