Related Experiment Video
Updated: Sep 9, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
9.7K
A General and Modular Approach to Solid-State Integration of Zero-Dimensional Quantum Systems
Marzieh Kavand1,2, Zoe Phillips1, William H Koll1
1Department of Physics, The Ohio State University, Columbus, Ohio 43210, United States.
Nano Letters
|September 3, 2025
Summary
We developed an all-electrical readout for quantum states using graphene and boron nitride tunnel junctions. This scalable method enables solid-state quantum device integration without optical readout.
Area of Science:
- Quantum Computing
- Materials Science
- Solid-State Physics
Background:
- Quantum technologies often rely on optical readout, limiting scalability and integration.
- Quasi-0D quantum states (0D-QS) like defects and molecules are promising qubits but require efficient readout methods.
Purpose of the Study:
- To present a modular, scalable, all-electrical readout mechanism for quasi-0D quantum states.
- To demonstrate integration with solid-state quantum technologies.
Main Methods:
- Fabrication of high-quality tunnel junctions using mechanical exfoliation and stacking of multilayer graphene (MLG) and hexagonal boron nitride (hBN).
- Encapsulation of target 0D-QS within an MLG/hBN/0D-QS/hBN/MLG heterostructure.
- Utilizing Coulomb and spin-blockade effects for all-electronic spectroscopy and readout.
Main Results:
- Demonstrated electronic tunneling spectroscopy of point defects in hBN.
- Successfully performed spectroscopy on the molecular qubit vanadyl phthalocyanine.
- Validated an all-electrical readout scheme for 0D-QS.
Conclusions:
- This approach offers a new pathway for incorporating molecules and atomic defects into solid-state quantum devices.
- The developed readout scheme bypasses the limitations of optical processes, enabling broader applications.
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