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Making high-quality quantum microwave devices with van der Waals superconductors
Abhinandan Antony1, Martin V Gustafsson2, Anjaly Rajendran3
1Department of Mechanical Engineering, Columbia University, New York, NY 10027, United States of America.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 30, 2021
Summary
Ultra low-loss microwave materials are essential for superconducting quantum devices. Researchers fabricated niobium selenide (NbSe2) resonators achieving a quality factor over 10^5, demonstrating 2D materials
Area of Science:
- Quantum computing
- Materials science
- Condensed matter physics
Background:
- Superconducting qubits require ultra low-loss microwave materials to improve quantum coherence and scalability.
- Van der Waals (vdW) heterostructures offer a promising platform for quantum devices due to their single-crystal nature and clean interfaces.
Purpose of the Study:
- To investigate the microwave loss properties of 2D layered materials for quantum applications.
- To fabricate and characterize superconducting microwave resonators using niobium selenide (NbSe2).
Main Methods:
- Fabrication of superconducting microwave resonators utilizing NbSe2.
- Characterization of resonator quality factor (Q) in the microwave regime.
Main Results:
- Achieved a quality factor (Q) greater than 10^5 for NbSe2-based resonators.
- This Q-factor implies a resistance upper bound of less than or equal to 192μΩ in a transmon circuit.
Conclusions:
- Demonstrated the compatibility of 2D layered materials, specifically NbSe2, with high-quality microwave quantum devices.
- The results highlight the potential of vdW heterostructures for advancing superconducting quantum technologies.
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