Coupler Qubit Flux Control and Readout on a Single Input Line
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Solution Overview
Problem
Existing quantum computing systems require separate devices for readout control and flux control of coupler qubits, leading to increased wiring and real estate usage in cryogenic environments, which can introduce noise and errors.
Innovation Solution
A single electronic structure is designed to provide both readout control and flux control of a coupler qubit using a multiplexed input line and a readout and flux control subsystem, allowing for simultaneous operation and reducing the need for separate input lines and hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate devices are used for readout control and flux control of coupler qubits, then control functionality is provided, but wiring complexity and real estate usage in cryogenic environments increase
Solution Approach 1:
The patent combines separate readout control and flux control devices into a single integrated electronic structure. This single device provides both readout control signals and flux control signals to the coupler qubit, thereby reducing wiring complexity and real estate usage in cryogenic environments while maintaining full control functionality.
Solution Approach 2:
The electronic structure is designed to perform multiple functions simultaneously: it provides both readout control and flux control capabilities through a single device. This multi-functional design eliminates the need for separate dedicated devices for each control function, reducing overall system complexity.
2Adaptability or versatility
If separate devices are used for readout control and flux control of coupler qubits, then control functionality is provided, but real estate usage in cryogenic environments increases
Solution Approach 1:
The patent merges separate readout control and flux control devices into one integrated electronic structure. This consolidation significantly reduces the physical space required in cryogenic environments, as only one device and its associated wiring are needed instead of multiple separate devices.
Solution Approach 2:
The single electronic structure is designed to perform both readout control and flux control functions, making it a universal control device. This multi-functionality allows the system to maintain full control capabilities while occupying minimal real estate in the cryogenic environment.
3Ease of operation
If separate input lines are used for readout and flux control, then control signals can be transmitted, but noise and errors in the quantum system increase
Solution Approach 1:
The patent combines readout and flux control functions into a single electronic structure that uses a unified signal transmission path. This integration reduces the total number of input lines and interfaces, thereby minimizing sources of noise and errors that could degrade qubit coherence time.
Data Source
AI summary
One or more systems, devices and/or computer-implemented methods of use provided herein relate to single-device readout of the state of a coupler qubit and flux control of that coupler qubit, which processes can be performed simultaneously. In one or more embodiments, an electronic system comprises a coupler qubit, a pair of superconducting qubits coupled to the coupler qubit, a multiplexed input line, and a readout and flux control subsystem coupled between the multiplexed input line and the coupler qubit, wherein the readout and flux control subsystem is configured to allow for both readout of a state of the coupler qubit and flux control that adjusts a coupling between the pair of superconducting qubits. The diplexer couples together the readout resonator and a flux control portion of the electronic system, wherein the readout resonator and the flux control portion are separated from one another between the diplexer and the coupler qubit.