Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrafast Quantum Gates in Circuit QED   We present a method of implementing ultrafast two-qubit gates valid for the
ultrastrong coupling (USC) and deep strong coupling (DSC) regimes of
light-matter interaction, considering state-of-the-art circuit quantum
electrodynamics (QED) technology. Our proposal includes a suitable qubit
architecture and is based on a four-step sequential displacement of an
intracavity mode, operating at a time proportional to the inverse of the
resonator frequency. Through ab initio calculations, we show that these quantum
gates can be performed at subnanosecond time scales, while keeping the fidelity
above 99%.

37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math