Journal of Low Temperature Physics

, Volume 195, Issue 1–2, pp 138–152 | Cite as

A Spiral Surface Acoustic Wave Transducer for Quantum Information Processing

  • Alan SalariEmail author
  • Amin Darvazehban


A superconducting surface acoustic wave transducer with a spiral geometry is proposed. This transducer is particularly useful for quantum information processing at cryogenic temperatures. Compared to an interdigital transducer, which launches acoustic waves in two directions, a spiral transducer (SPT) is capable of launching waves in four directions. This property allows to utilize the substrate surface in a more efficient way due to the transition from a line to a surface. Most importantly this kind of transducer gives us new possibilities for quantum information processing, since it can be used as a superconducting transmon qubit, which can be simultaneously coupled to two acoustic cavities. Moreover, it can be used for acoustic transport of quantum dot qubits, which could improve the means for long-range coupling of the qubits. The SPT has been simulated using COMSOL simulator, and it is also modeled using P-matrix and delta function model.


Superconducting components and technology Quantum devices and circuits SAW devices Quantum dot Passive microwave components 



Alan Salari acknowledges David P. DiVincenzo for the support and helpful discussions.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute for Quantum InformationRWTH Aachen UniversityAachenGermany
  2. 2.Institute of Physics IIUniversity of CologneCologneGermany
  3. 3.Electrical Engineering DepartmentUniversity of QueenslandBrisbaneAustralia

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