Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transferring entangled states of photonic cat-state qubits in circuit
  QED   We propose a method for transferring quantum entangled states of two photonic
cat-state qubits (cqubits) from two microwave cavities to the other two
microwave cavities. This proposal is realized by using four microwave cavities
coupled to a superconducting flux qutrit. Because of using four cavities with
different frequencies, the inter-cavity crosstalk is significantly reduced.
Since only one coupler qutrit is used, the circuit resources is minimized. The
entanglement transfer is completed with a single-step operation only, thus this
proposal is quite simple. The third energy level of the coupler qutrit is not
populated during the state transfer, therefore decoherence from the higher
energy level is greatly suppressed. Our numerical simulations show that
high-fidelity transfer of two-cqubit entangled states from two transmission
line resonators to the other two transmission line resonators is feasible with
current circuit QED technology. This proposal is universal and can be applied
to accomplish the same task in a wide range of physical systems, such as four
microwave or optical cavities, which are coupled to a natural or artificial
three-level atom.

29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
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The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph