On-Chip Impedance Matching for Wider-Bandwidth Microwave Quantum Circuits
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Solution Overview
Problem
Existing microwave quantum circuit systems face challenges in achieving optimal performance due to impedance mismatch between components, which limits bandwidth and efficiency, particularly in quantum information processing applications.
Innovation Solution
Integrating an impedance matching circuit device on the same substrate as the quantum circuit device, such as a parametric amplifier, to enhance performance by improving bandwidth and efficient coupling with other circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If impedance matching circuit device is integrated on the same substrate as quantum circuit device, then bandwidth and performance are improved, but device complexity increases
Solution Approach 1:
The impedance matching circuit device is integrated on the same substrate as the quantum circuit device, merging two previously separate components into a single unified system. This integration improves bandwidth and performance by enabling efficient coupling between components while maintaining compact form factor, despite increasing overall device complexity.
2Ease of operation
If impedance matching circuit device is integrated on the same substrate, then coupling efficiency with other circuitry is improved, but manufacturing complexity increases
Solution Approach 1:
By integrating the impedance matching circuit device on the same substrate as the quantum circuit device, the patent achieves improved coupling efficiency between components. This merger eliminates the need for separate coupling mechanisms and external impedance matching components, thereby simplifying operation despite increasing manufacturing complexity due to the integrated design.
Data Source
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AI summary
In a general aspect, a microwave quantum circuit includes an on-chip impedance matching circuit. In some cases, a microwave quantum circuit includes a dielectric substrate, a quantum circuit device on the substrate, and an impedance matching circuit device on the substrate. The quantum circuit device includes a Josephson junction, and the impedance matching circuit device is coupled to the quantum circuit device on the substrate.