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Updated: Sep 28, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Vibration damping platform for cavity quantum-electrodynamics experiments.

N Sauerwein¹, T Cantat-Moltrecht¹, I T Grigoras¹

¹Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

The Review of Scientific Instruments

|April 2, 2022

Summary

This summary is machine-generated.

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We developed a novel composite mechanical platform that significantly reduces vibrations for cavity quantum-electrodynamics experiments. This platform passively damps vibrations up to 100 kHz, improving experimental stability.

Area of Science:

Quantum Physics
Experimental Physics
Mechanical Engineering

Background:

Cavity quantum-electrodynamics (cQED) experiments require exceptional mechanical stability.
Vibrations from actuators can disrupt optical alignment and cavity length, degrading experimental performance.
Existing platforms often struggle to suppress vibrations effectively across a wide frequency range.

Purpose of the Study:

To design and demonstrate a mechanical platform with superior vibration damping for cQED.
To passively suppress mechanical resonances impacting cavity length stability.
To provide a versatile platform compatible with ultra-high vacuum and demanding experimental setups.

Main Methods:

A composite design integrating a soft, vibration-damping core with a rigid shell for optical alignment.

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Passive vibration damping of piezoelectric actuator-induced noise.

Characterization of mechanical resonance suppression up to 100 kHz.

Main Results:

The composite platform effectively suppresses mechanical resonances.
Vibrations are passively damped up to 100 kHz, significantly enhancing cavity length stability.
The platform maintains optical alignment crucial for cQED.

Conclusions:

The developed mechanical platform offers enhanced vibration damping for cQED.
Its design is suitable for applications requiring long cavities and optical access.
The platform provides a stable environment for sensitive quantum experiments.