Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-step implementation of the genuine Fredkin gate in high-$Q$ coupled
  three-cavity arrays   We present two efficient methods for implementing the Fredkin gate with atoms
separately trapped in an array of three high-$Q$ coupled cavities. The first
proposal is based on the resonant dynamics, which leads to a fast resonant
interaction in a certain subspace while leaving others unchanged, and the
second one utilizes a dispersive interaction such that the effective
long-distance dipole-dipole interaction between two distributed target qubits
is achieved by virtually excited process. Both schemes can achieve the standard
form of the Fredkin gate in a single step without any subsequent single-qubit
operation. The effects of decoherence on the performance of the gate are also
analyzed in virtue of master equation, and the strictly numerical simulation
reveals that the average fidelity of the quantum gate is high.

30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat