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Updated: Jun 20, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Programmable microwave cluster states via Josephson metamaterials.
A Alocco1,2, A Celotto1,2, E Palumbo1,2
1Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy.
Nature Communications
|June 18, 2026
Summary
Researchers demonstrate on-demand generation of microwave cluster states for quantum computing using a programmable Josephson Traveling-Wave Parametric Amplifier (JTWPA). This scalable method enables advanced measurement-based quantum information processing in superconducting circuits.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Microwave Engineering
Background:
- Cluster states are crucial for scalable measurement-based quantum computing.
- Existing methods face limitations in generating large-scale entangled states.
- Superconducting circuits offer a promising platform for quantum technologies.
Purpose of the Study:
- To demonstrate on-demand generation of multimode entangled microwave cluster states.
- To utilize a programmable Josephson Traveling-Wave Parametric Amplifier (JTWPA) for this purpose.
- To enable scalable quantum information processing in the microwave domain.
Main Methods:
- Operation of a JTWPA in the three-wave mixing regime.
- Injection of tailored, non-equidistant pump tones using an arbitrary waveform generator.
- Frequency-resolved heterodyne detection for entanglement verification.
Main Results:
- Successful on-demand generation of multimode entangled microwave cluster states.
- Confirmation of the target graph topology of the cluster state.
- Demonstration of reconfigurability via pump spectrum adjustment.
Conclusions:
- The JTWPA platform enables scalable and reconfigurable generation of cluster states.
- This approach is compatible with superconducting circuit architectures.
- It opens new avenues for measurement-based quantum information processing.
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