Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simplify proposal for realizing multiqubit tunable phase gate in circuit
  QED   We propose a scheme to realize a multiqubit tunable phase gate in a circuit
QED setup where two resonators, each coupling with a qudit, are interconnected
to a common qudit (d=4). In this proposal, only two levels of each qudit serve
as the logical states and the other two levels are used for the gate
realization. The proposal is efficient and simple because only a classical
microwave pulse is needed, no matter how many qudits are involved, which
significantly reduces experimental difficulty. In a nonresonant case, the
tunable phase gate can be achieved readily, while under the resonant condition,
a {\pi}-phase gate can be realized after a full cycle of Rabi oscillation where
the gate speed is rather fast due to the resonant interaction. We have shown
that the resulting effective dynamics allows for the creation of a
high-fidelity phase gate. The influence of various decoherence processes such
as the decay of the resonator mode and the relaxation of the qudits is
investigated. Moreover, the proposed scheme can be easily generalized to
realize N-qubit phase gate.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol