Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simultaneous quantum state exchange or transfer between two sets of
  cavities and generation of multiple Einstein-Podolsky-Rosen pairs via a
  superconducting coupler qubit   We propose an approach to simultaneously perform quantum state exchange or
transfer between two sets of cavities, each containing $N$ cavities, by using
only one superconducting coupler qubit. The quantum states to be exchanged or
transferred can be arbitrary pure or mixed states and entangled or
nonentangled. The operation time does not increase with the number of cavities,
and there is no need of applying classic pulses during the entire operation.
Moreover, the approach can be also applied to realize quantum state exchange or
transfer between two sets of qubits, such as that between two multi-qubit
quantum registers. We further show that the present proposal can be used to
simultaneously generate multiple Einstein-Podolsky-Rosen pairs of photons or
qubits, which are important in quantum communication. The method can be
generalized to other systems by using different types of physical qubit as a
coupler to accomplish the same task.

23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin