Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valley pair qubits in double quantum dots of gapped graphene   The rise of graphene opens a new door to qubit implementation, as discussed
in the recent proposal of valley pair qubits in double quantum dots of gapped
graphene (Wu et al., arXiv: 1104.0443 [cond-mat.mes-hall]). The work here
presents the comprehensive theory underlying the proposal. It discusses the
interaction of electrons with external magnetic and electric fields in such
structures. Specifically, it examines a strong, unique mechanism, i.e., the
analogue of the 1st-order relativistic effect in gapped graphene. This
mechanism is state mixing free and allows, together with the electrically
tunable exchange coupling, a fast, all-electric manipulation of qubits via
electric gates, in the time scale of ns. The work also looks into the issue of
fault tolerance in a typical case, yielding at 10oK a long qubit coherence time
(~O(ms)).

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs