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Related Experiment Video

Updated: Sep 9, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

3D-printed micro ion trap technology for quantum information applications.

Shuqi Xu^1,2, Xiaoxing Xia³, Qian Yu^4,5

¹Department of Physics, University of California, Berkeley, CA, USA. sqxu@berkeley.edu.

|September 3, 2025

Summary

This summary is machine-generated.

High-resolution 3D printing enables fabrication of miniaturized ion traps for quantum information processing. This technology offers design freedom and precision, improving ion confinement and enabling high-fidelity quantum operations.

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Last Updated: Sep 9, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

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Area of Science:

Physics
Quantum Technology
Materials Science

Background:

Trapped-ion applications (quantum information processing, precision measurements, optical clocks, mass spectrometry) require specialized ion traps.
Traditional machining creates macroscopic 3D Paul traps, while photolithography miniaturizes traps but struggles with complex 3D electrode structures.
Fabricating complex 3D electrode structures for optimal ion confinement remains a challenge.

Purpose of the Study:

To demonstrate a high-resolution 3D printing technology for fabricating miniaturized 3D ion traps.
To evaluate the performance of these 3D-printed ion traps for trapped-ion applications.
To explore the potential of 3D printing for optimizing ion trap design and functionality.

Main Methods:

Utilized high-resolution 3D printing based on two-photon polymerization (2PP) technology.
Fabricated large arrays of miniaturized 3D ion traps.
Trapped calcium ions and measured radial trap frequencies.

Main Results:

Successfully trapped calcium ions in 3D-printed ion traps with radial frequencies from 2 MHz to 24 MHz.
Achieved high-quality Rabi oscillations with Doppler cooling only, due to tight ion confinement.
Demonstrated a two-qubit gate with a high Bell-state fidelity of 0.978 ± 0.012.

Conclusions:

3D-printed ion traps combine strong radial confinement with on-chip miniaturization.
This technology expands design freedom for ion trap geometries without sacrificing scalability and precision.
Optimized ion trap designs fabricated via 3D printing can enhance performance and functionality for trapped-ion applications.