Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon-spin qubit-conversion based on Overhauser shift of Zeeman
  energies in quantum dots   We propose a new method to realize a conversion of photon qubit and spin
qubit using the effective magnetic field created by the nuclear polarization
known as Overhauser field. We discuss its preliminary experiment on
InAlAs/AlGaAs self-assembled quantum dot and also discuss effects of excitons
which could destroy the conversion.

15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph