Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 31: Superconducting Electronics and Cryogenics: Poster Session
TT 31.22: Poster
Donnerstag, 8. September 2022, 15:00–18:00, P1
Multilayer surface acoustic wave resonators at cryogenic temperatures — •Alexander Jung1,2, Thomas Luschmann1,2,3, Achim Marx1, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universitaet Muenchen, Garching, Germany — 3Munich Center for Quantum Science and Technologies (MCQST), Munich, Germany
Circuit quantum acoustodynamics uses the piezoelectric coupling of surface acoustic waves (SAW) to superconducting qubits for the implementation of concepts known from circuit quantum electrodynamics [1,2]. In this approach, the role of electromagnetic field is replaced by an acoustic wave propagating at the speed of sound. Moreover, the wavelength of acoustic waves is of the order of the size of the artificial atom, and thus their interaction with the qubit can no longer be treated pointlike. SAW resonators are an essential building block for quantum acoustodynamics. Of particular interest is the integration of SAWs using a piezoelectric on a silicon substrate to combine highly coherent qubits with excellent SAW properties. However, this changes the properties of the SAWs in particular for thin piezoelectric films. Here, we present simulations and experimental studies of SAW resonators fabricated on bulk and thin film piezoelectric substrates at cryogenic temperatures to understand the SAW as multilayer system.
[1] A.F.Kockum, International Symposium on Mathematics, Quantum Theory, and Cryptography (2021)
[2] Mathematics for Industry, 33, 125 (2020)