Qubit Readout Band-Pass Filter for Wideband Uniform Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic circuits with qubits face challenges in achieving a wide passband with uniform characteristics and high-speed readout operations, often resulting in limited out-of-band suppression and difficulty in collectively reading multiple qubit states.
Innovation Solution
The electronic circuit incorporates a band-pass filter with multiple filter resonators that are electromagnetically coupled, including a configuration where two adjacent filter resonators are mutually couplable, and each circuit includes a qubit and a readout resonator, allowing for a wide passband with uniform characteristics and enhanced out-of-band suppression by positioning additional filter resonators between primary resonators connected to ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a band-pass filter with multiple filter resonators is used to achieve a wide passband with uniform characteristics, then the passband uniformity is improved, but the device complexity increases
Solution Approach 1:
The band-pass filter is segmented into multiple filter resonators (first, second, third, and fourth filter resonators) that are coupled in series. Each resonator contributes to shaping the overall passband characteristics, allowing the filter to achieve a wide and uniform passband by dividing the filtering function across multiple discrete elements rather than using a single complex resonator.
Solution Approach 2:
Multiple filter resonators are combined in a coupled configuration where the first filter resonator is coupled to the second, and the third is coupled to the fourth. This merging of multiple resonating elements creates a composite filter response that achieves both wide bandwidth and uniformity across the passband, resolving the contradiction between simple structure and uniform characteristics.
2Object-affected harmful factors
If filter resonators are positioned between primary resonators connected to ports to enhance out-of-band suppression, then the out-of-band suppression is improved, but the device complexity increases
Solution Approach 1:
The third and fourth filter resonators serve as intermediary elements positioned between the port-connected first and second filter resonators. These intermediate resonators act as mediators that enhance the filtering action by providing additional frequency-selective stages, thereby improving out-of-band suppression without requiring a complete redesign of the entire filter structure.
Solution Approach 2:
Different regions of the filter have different functional qualities: the first and second filter resonators connected to ports provide primary frequency selection, while the third and fourth filter resonators positioned between them provide enhanced out-of-band suppression. This local differentiation of function allows each resonator to be optimized for its specific role, achieving high out-of-band rejection with a relatively simple overall structure.
3Productivity
If multiple filter resonators are coupled to readout resonators of multiple first circuits, then the readout speed is improved, but the device complexity increases
Solution Approach 1:
The band-pass filter with multiple filter resonators serves multiple functions simultaneously: it provides frequency selection, passband uniformity, out-of-band suppression, and enables collective readout of multiple qubit states. This multi-functionality allows a single filter structure to support high-speed readout of multiple first circuits without requiring separate filtering mechanisms for each circuit, thereby improving productivity without proportionally increasing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables faster readout operations with improved characteristics, allowing for high-speed readout of multiple qubit states while maintaining low loss and large out-of-band suppression, thereby enhancing the performance of electronic circuits and calculators.
Implementation Method 1
two adjacent filter resonators included in the plurality of filter resonators are mutually couplable
Implementation Method 2
The band-pass filter includes a plurality of filter resonators
Implementation Method 3
the first readout resonator being couplable with the first qubit
Data Source
AI summary
According to one embodiment, an electronic circuit includes a band-pass filter, first circuits, a first port, and a second port. The band-pass filter includes filter resonators. Two adjacent filter resonators included in the filter resonators are mutually couplable. Each of the first circuits includes a first qubit and a first readout resonator. The first readout resonator is couplable with the first qubit. One of the filter resonators is couplable with the first readout resonator of one of the first circuits. Another one of the filter resonators is couplable with the first readout resonator of another one of the first circuits. The filter resonators include first, second, and third filter resonators. The first filter resonator is couplable with the first port. The second filter resonator is couplable with the second port. The third filter resonator is between the first filter resonator and the second filter resonator.