Superconducting Qubit Wiring for Fewer Control and I/O Lines
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Solution Overview
Problem
The increasing number of qubits and couplers in superconducting quantum computers leads to a significant increase in the total number of necessary signal lines and control lines, making implementation difficult.
Innovation Solution
Combining the signal transmission wiring for qubits and couplers into a single wiring that functions both as a transmission of a magnetic flux and a capacitive coupling for input and output signals, reducing the number of wirings required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of qubits and couplers is increased, then the computational power is improved, but the number of wirings increases significantly
Solution Approach 1:
The patent combines the control line and input/output line into a single wiring structure. The control line transmits both control signals (for frequency adjustment) and input/output signals (for reading qubit states), merging two previously separate wiring functions into one physical line, thereby reducing the total number of wirings required
Solution Approach 2:
The single wiring structure performs multiple functions: it serves as both a control line for adjusting qubit frequency and as an input/output line for reading qubit states. This multi-functional design eliminates the need for separate dedicated control and I/O wirings for each qubit
2Manufacturing precision
If separate control lines and input/output lines are used for each qubit, then the control precision is improved, but the wiring complexity increases
Solution Approach 1:
The control line and input/output line are merged into a single wiring structure that carries both control signals and measurement signals. This combination maintains the ability to precisely control qubit frequency while reducing wiring complexity
Solution Approach 2:
The single wiring is segmented into different functional regions: a control signal transmission region for frequency adjustment and an input/output signal transmission region for reading qubit states. This segmentation allows precise control while using a unified wiring structure
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 approach effectively reduces the number of wirings, facilitating easier implementation and operation of superconducting quantum circuits.
Implementation Method 1
a wiring used as a transmission of a signal to generate a magnetic flux to be applied to the qubit
Implementation Method 2
a wiring used as a transmission of a signal input by capacitive coupling to and/or output, by capacitive coupling from the qubit
Data Source
AI summary
A superconducting quantum circuit apparatus includes a qubit; and a first wiring with a wiring used as a transmission of a signal to generate a magnetic flux to be applied to the qubit and a wiring used as a transmission of a signal input by capacitive coupling to and/or output, by capacitive coupling from the qubit, combined together thereinto, as a single wiring.