The interaction of superconducting qubits with surface acoustic wave resonators in quantum regime has been achieved recently. It opens a new field of research – quantum acoustodynamics – and allows developing new types of quantum devices. The main challenge in this direction is to manufacture acoustic resonators in the gigahertz range. Here, we demonstrate that the structure of a hybrid acoustodynamic device can be significantly simplified, if we replace an acoustic resonator with a phononic crystal. Our crystal consists of narrow metallic stripes on a quartz surface. The artificial atom in turn interacts with a microwave transmission line. Therefore, two degrees of freedom of different nature, acoustic and electromagnetic, are coupled with a single quantum object. A scattering spectrum of propagating electromagnetic waves on the artificial atom visualizes acoustic modes of the phononic crystal. Our geometry allows realizing effects of quantum acoustics on a simple and compact system.
CITATION STYLE
Bolgar, A. N., Kirichenko, D. D., Shaikhaidarov, R. S., Sanduleanu, S. V., Semenov, A. V., Dmitriev, A. Y., & Astafiev, O. V. (2020). A phononic crystal coupled to a transmission line via an artificial atom. Communications Physics, 3(1). https://doi.org/10.1038/s42005-020-00475-2
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