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Updated: Jan 22, 2026
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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Distributed multi-parameter quantum metrology with a superconducting quantum network
Jiajian Zhang1, Lingna Wang2, Yong-Ju Hai1
1International Quantum Academy, Shenzhen, China.
Nature Communications
|January 20, 2026
Summary
Researchers developed distributed multiparameter quantum metrology using superconducting quantum networks. This approach enhances precision in measuring remote vector fields and their gradients across networked quantum systems.
Area of Science:
- Quantum physics
- Quantum information science
- Networked quantum systems
Background:
- Quantum metrology offers advanced precision for sensing and measurement.
- Distributed quantum metrology extends these capabilities to networked systems.
- Scalable multiparameter estimation in distributed quantum systems faces challenges in entanglement distribution and parameter incompatibility.
Purpose of the Study:
- To demonstrate distributed multiparameter quantum metrology on a superconducting quantum network.
- To overcome limitations in scalability and entanglement distribution for networked quantum sensing.
- To achieve enhanced precision in estimating vector fields and their gradients across spatially separated quantum nodes.
Main Methods:
- Utilized a modular superconducting quantum network with low-loss microwave interconnects.
- Implemented a control-enhanced sequential protocol for multiparameter estimation.
- Employed deterministic non-local entanglement generation and adaptive control within the network.
Main Results:
- Achieved up to 13.72 dB precision improvement in estimating all three components of a remote vector field compared to individual strategies.
- Demonstrated direct estimation of vector field gradients, realizing a 3.44 dB gain over local entanglement strategies.
- Showcased the capability of superconducting quantum networks for distributed quantum metrology.
Conclusions:
- Superconducting quantum networks provide a scalable and reconfigurable platform for advanced distributed quantum metrology.
- The demonstrated control-enhanced sequential protocol effectively addresses multiparameter estimation challenges in networked quantum systems.
- This work advances the practical implementation of distributed quantum sensing with enhanced precision.
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