Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mapping of few-electron wave-functions in semiconductor nanocrystals -
  evidence of exchange interaction   The influence of the tip-substrate bias induced electric field in a
scanning-tunneling-spectroscopy experiment on charged InAs nanocrystals is
studied. Calculating the ground and first excited many-particle state for five
electrons occupying the quantum dot reveals a Stark-induced reordering of
states by increasing the electric field strength. It is shown that this
reordering of states is accompanied by a symmetry change of the local density
of states (LDOS), which in principal is observable in a wave-function mapping
experiment. Since in the usually performed experiments the electric field can
not be directly controlled, we investigate the crystal size dependence of the
5-electron LDOS symmetry. It is found that the symmetry changes from spherical
to torus-like by increasing the nanocrystal radius.

25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph