Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single spin measurement in the solid state: a reader for a spin qubit   We describe a paradigm for measuring a single electron spin in a solid. This
is a fundamental problem in condensed matter physics. The technique can be used
to read a spin qubit relatively non-invasively in either a spintronic quantum
gate or a spintronic quantum memory. The spin reader can be self assembled by
simple electrochemical techniques and can be integrated with a quantum gate.

2
The categories of this paper are: math
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess