Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Charge-to-spin conversion of electron entanglement states and
  spin-interaction-free solid-state quantum computation
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci