Filter Multiplexer for Variable Annealing Bandwidth Selection
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Solution Overview
Problem
Existing quantum annealing processors face challenges in selecting optimal annealing bandwidths that are problem-dependent, requiring a compromise between calibration speed and problem-solving efficiency, with current methods introducing noise and signal interference.
Innovation Solution
A system and method for in-situ selection of annealing bandwidth using a multiplexer or tunable filter with superconducting switches and filters, allowing for continuous tuning and minimizing environmental degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed annealing bandwidth is used for quantum annealing processing, then the system structure is simple, but the calibration speed and problem-solving efficiency cannot be optimized for different computational tasks
Solution Approach 1:
The patent implements dynamic bandwidth selection by replacing fixed annealing lines with configurable pathways. Multiple annealing lines are provided with selective coupling mechanisms that allow the bandwidth characteristics to be dynamically adjusted based on computational task requirements, transforming a static system into an adaptive one.
Solution Approach 2:
The annealing system is segmented into multiple independent annealing lines, each with selectable coupling to the quantum processor. This segmentation allows different bandwidth characteristics to be chosen for different computational tasks, enabling adaptability without requiring complete system redesign.
2Adaptability or versatility
If multiple annealing lines with different bandwidths are provided, then adaptive bandwidth selection is enabled, but the device complexity and number of components increase
Solution Approach 1:
Multiple annealing lines are designed with universal coupling mechanisms that can selectively connect to the quantum processor. Each annealing line can serve different functional purposes (calibration, problem-solving, fast annealing, slow annealing) depending on the computational task, allowing one system to perform multiple functions without requiring separate dedicated hardware for each function.
Solution Approach 2:
Selective coupling mechanisms act as intermediaries between the multiple annealing lines and the quantum processor. These coupling mechanisms enable controlled signal transmission, allowing the system to choose which annealing line is active at any given time, thereby managing complexity through controlled interfaces rather than direct connections.
3Reliability
If conventional bandwidth selection methods are used, then the system is easy to operate, but noise and signal interference are introduced during annealing
Solution Approach 1:
The system incorporates feedback mechanisms that monitor the computational task requirements and automatically select the appropriate annealing line bandwidth. This feedback loop enables the system to optimize signal quality by choosing the right bandwidth characteristics for each task without requiring manual intervention, thereby maintaining ease of operation while improving reliability.
Solution Approach 2:
The annealing system performs self-configuration by automatically selecting the appropriate bandwidth based on the computational task being executed. The system serves itself by making intelligent decisions about which annealing line to use, eliminating the need for complex manual configuration while ensuring optimal signal quality for each specific task.
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
Enables efficient and noise-minimized annealing bandwidth adjustment, improving calibration speed and problem-solving performance by adapting to specific computational tasks.
Implementation Method 1
The at least one switch may be a superconducting switch. The at least one superconducting switch may be a cryotron.
Implementation Method 2
Quantum annealing may use quantum effects, such as quantum tunneling, as a source of delocalization to reach an energy minimum.
Data Source
AI summary
A filter multiplexer for variable bandwidth annealing selection is described. The filter multiplexer has multiple pathways, where each pathway comprises a switch and a filter. Each filter has a different cutoff frequency from the other filters. Switches may be cryogenic switches. Each pathway may be communicatively coupled to an external annealing line. Upon receiving a problem, an annealing bandwidth can be selected, set or configured via the multiplexer to operate a quantum processor with a desired annealing schedule. The multiplexer may be used for calibration of a quantum processor by performing a calibration with a large annealing bandwidth, then calibrating the quantum processor by iterating through all available annealing bandwidths from the multiplexer.