What question did this study set out to answer?

This project aims to develop a high-Q surface acoustic wave resonator for enhancing quantum information storage and coherence.

June 3, 2026

Optimization of high-Q surface acoustic wave resonators using cylindrical phononic crystal structures

Key Points

This project aims to develop a high-Q surface acoustic wave resonator for enhancing quantum information storage and coherence.
Utilized interdigitated transducers and cylindrical phononic crystal mirrors arranged in a square lattice.
Analyzed the phononic crystal band gap and tuned the IDT for optimal resonance.
Achieved optimal performance with a mirror spacing of 7.8 μm.
Exhibited a sharp S11 dip indicating effective confinement of surface acoustic waves.
Achieved an exceptionally high Q-frequency of 8.34 × 10^15 at 2.284 GHz, showing low energy loss.
Demonstrated strong potential for efficiency in quantum systems.

Abstract

This project introduces a high-Q surface acoustic wave (SAW) resonator for superconducting quantum circuits, designed to enhance quantum information storage and coherence. The resonator employs interdigitated transducers (IDTs) and cylindrical phononic crystal (PnC) mirrors arranged in a square lattice to confine surface acoustic waves. By analyzing the PnC band gap and tuning the IDT for resonance, optimal performance was achieved with a mirror spacing of 7.8 μm (m = 12). The design exhibits a sharp S11 dip and an exceptionally high Q-frequency of 8.34 × 1015 at 2.284 GHz, indicating low energy loss and strong potential for quantum system efficiency.

Optimization of high-Q surface acoustic wave resonators using cylindrical phononic crystal structures

Key Points

Abstract

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