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Updated: Mar 4, 2026

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

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

Published on: August 2, 2019

Control and readout hardware platform for quantum diamond magnetic gradiometer.

Zhongli Zhang¹, Wenzhe Zhang^1,2, Xi Qin^1,3,4

¹Laboratory of Spin Magnetic Resonance, School of Physical Sciences, Anhui Province Key Laboratory of Scientific Instrument Development and Application, University of Science and Technology of China, Hefei 230026, China.

The Review of Scientific Instruments

|March 3, 2026

Summary

This summary is machine-generated.

A new hardware platform for quantum magnetic gradiometers using nitrogen-vacancy centers in diamond offers scalable multi-channel signal readout. This control and readout system enables advanced quantum engineering applications.

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Area of Science:

Quantum Sensing
Diamond Magnetometry

Background:

Nitrogen-vacancy (NV) centers in diamond are promising for sensitive magnetic field detection.
Implementing NV-center-based magnetometers requires sophisticated control and readout electronics.

Purpose of the Study:

To develop a versatile control and readout hardware platform for quantum magnetic gradiometers utilizing NV centers in diamond.
To enable scalable multi-channel signal acquisition for advanced quantum sensing applications.

Main Methods:

Designed a mother-daughter board architecture for modularity and channel expansion.
Integrated central control and data distribution on the mother board.
Implemented signal readout and feedback control for individual NV-center vector magnetic probes on daughter boards.

Main Results:

Achieved an equivalent current noise below 16 pA/√Hz for each probe channel.
Demonstrated the platform's implementation on a quantum diamond magnetic gradiometer.
The mother-daughter board architecture facilitates channel scalability.

Conclusions:

The developed hardware platform is suitable for quantum magnetic gradiometers based on NV centers in diamond.
The modular design offers significant advantages for expandable multi-channel readout systems.
This technology holds promise for future quantum engineering applications requiring high-density magnetic field sensing.