Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Circuit quantum acoustodynamics with surface acoustic waves   The experimental investigation of quantum devices incorporating mechanical
resonators has opened up new frontiers in the study of quantum mechanics at a
macroscopic level$^{1,2}$. Superconducting microwave circuits have proven to be
a powerful platform for the realisation of such quantum devices, both in cavity
optomechanics$^{3,4}$, and circuit quantum electro-dynamics (QED)$^{5,6}$.
While most experiments to date have involved localised nanomechanical
resonators, it has recently been shown that propagating surface acoustic waves
(SAWs) can be piezoelectrically coupled to superconducting qubits$^{7,8}$, and
confined in high-quality Fabry-Perot cavities up to microwave frequencies in
the quantum regime$^{9}$, indicating the possibility of realising coherent
exchange of quantum information between the two systems. Here we present
measurements of a device in which a superconducting qubit is embedded in, and
interacts with, the acoustic field of a Fabry-Perot SAW cavity on quartz,
realising a surface acoustic version of cavity quantum electrodynamics. This
quantum acoustodynamics (QAD) architecture may be used to develop new quantum
acoustic devices in which quantum information is stored in trapped on-chip
surface acoustic wavepackets, and manipulated in ways that are impossible with
purely electromagnetic signals, due to the $10^{5}$ times slower speed of
travel of the mechanical waves.

37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th