1. A phononic crystal coupled to a transmission line via an artificial atom.
- Author
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Bolgar, Aleksey N., Kirichenko, Daniil D., Shaikhaidarov, Rais. S., Sanduleanu, Shtefan V., Semenov, Alexander V., Dmitriev, Aleksey Yu., and Astafiev, Oleg V.
- Subjects
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PHONONIC crystals , *QUBITS , *ACOUSTIC resonance , *ELECTROMAGNETIC waves , *DEGREES of freedom - Abstract
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. Quantum devices with integrate mechanical resonators offer promising possibilities for the development of superconducting quantum systems for quantum technologies. The authors present results on a superconducting qubit simultaneously coupled to an acoustic and electromagnetic system showcasing a new geometry for a circuit quantum acoustodynamics device. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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