Making high-quality quantum microwave devices with van der Waals superconductors
Abstract
Ultra low-loss microwave materials are crucial for enhancing quantum coherence and scalability of superconducting qubits. Van der Waals (vdW) heterostructure is an attractive platform for quantum devices due to the single-crystal structure of the constituent two-dimensional (2D) layered materials and the lack of dangling bonds at their atomically sharp interfaces. However, new fabrication and characterization techniques are required to determine whether these structures can achieve low loss in the microwave regime. Here we report the fabrication of superconducting microwave resonators using NbSe2 that achieve a quality factor Q > 105. This value sets an upper bound that corresponds to a resistance of ⩽ 192 μ Ω when considering the additional loss introduced by integrating NbSe2 into a standard transmon circuit. This work demonstrates the compatibility of 2D layered materials with high-quality microwave quantum devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 21, 2021
- Source ID
- 10.1088/1361-648x/ac3e9d
Entities
People
- Abhinandan Antony
- Anjaly Rajendran
- Avishai Benyamini
- Guilhem Ribeill
- James C. Hone
- Kin Chung Fong
- Martin V. Gustafsson
- Thomas A. Ohki
Organizations
- Army Research Office