Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphene-based qubits in quantum communications   We explore the potential application of graphene-based qubits in photonic
quantum communications. In particular, the valley pair qubit in double quantum
dots of gapped graphene is investigated as a quantum memory in the
implementation of quantum repeaters. For the application envisioned here, our
work extends the recent study of the qubit (Wu et al., arXiv: 1104.0443; Phys.
Rev. B 84, 195463 (2011)) to the case where the qubit is placed in a normal
magnetic field-free configuration. It develops, for the configuration, a method
of qubit manipulation, based on a unique AC electric field-induced,
valley-orbit interaction-derived mechanism in gapped graphene. It also studies
the optical response of graphene quantum dots in the configuration, in terms of
valley excitation with respect to photonic polarization, and illustrates
faithful photon \leftrightarrow valley quantum state transfers. This work
suggests the interesting prospect of an all-graphene approach for the solid
state components of a quantum network, e.g., quantum computers and quantum
memories in communications.

3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an