Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of solid state quantum information processing   Recent theoretical work on solid-state proposals for the implementation of
quantum computation and quantum information processing is reviewed. The
differences and similarities between microscopic and macroscopic qubits are
highlighted and exemplified by the spin qubit proposal on one side and the
superconducting qubits on the other. Before explaining the spin and
supercondcuting qubits in detail, some general concepts that are relevant for
both types of solid-state qubits are reviewed. The controlled production of
entanglement in solid-state devices, the transport of carriers of entanglement,
and entanglement detection will be discussed in the final part of this review.

16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex