Quantum Bit Control Signal Delay Calibration Method
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Solution Overview
Problem
In modern superconducting quantum systems, the synchronization of multi-channel control signals is critical for achieving quantum entanglement, but the delay inconsistencies in trigger signals due to cable, connector, and PCB routing cause sampling ambiguity, leading to false triggering and significant synchronization errors.
Innovation Solution
A quantum bit control signal delay calibration method that involves obtaining a multi-channel trigger signal, sampling it at a preset interval, counting effective sampling values, adjusting the sampling time based on a preset delay step length, and generating a fuzzy severity quantization sequence to determine actual delay values and correct the trigger signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed-frequency clock is used to sample the trigger signal, then the sampling process is simple, but sampling ambiguity occurs leading to false triggering and synchronization errors
Solution Approach 1:
The patent implements a feedback mechanism where the sampled trigger signal is compared with expected timing patterns, and the sampling clock phase is automatically adjusted based on detected timing errors. This closed-loop feedback system eliminates sampling ambiguity by continuously optimizing the sampling phase to avoid edge transitions, thereby resolving the contradiction between simple sampling operation and triggering accuracy.
Solution Approach 2:
The patent changes the phase parameter of the sampling clock dynamically rather than using a fixed phase. By adjusting the sampling clock phase based on detected trigger signal characteristics, the system adapts to timing variations and avoids sampling edges, thus maintaining both operational simplicity and triggering accuracy through parameter optimization.
2Stability of the object's composition
If the sampling clock phase is fixed, then the system is stable, but delay inconsistencies from cable and PCB routing cause sampling ambiguity
Solution Approach 1:
The patent transforms the static fixed-phase sampling clock into a dynamic adjustable sampling clock. The system continuously monitors trigger signal arrivals and adjusts the sampling clock phase in real-time to compensate for routing delays and timing variations, thereby maintaining both system stability and timing precision through controlled dynamics.
Solution Approach 2:
The patent performs preliminary calibration of the sampling clock phase before actual trigger sampling. By pre-adjusting the sampling phase based on expected timing characteristics and routing delays, the system proactively eliminates potential sampling ambiguity, ensuring both stability and precision without requiring complex real-time adjustments during operation.
3Adaptability or versatility
If multi-channel trigger signals are used for quantum bit control, then the system can control multiple quantum bits, but delay inconsistencies cause asynchronous triggering and synchronization errors
Solution Approach 1:
The patent segments the synchronization problem by implementing independent phase calibration for each channel while maintaining a unified reference clock. Each channel's sampling clock phase is independently optimized to compensate for its specific routing delays, allowing multi-channel operation with high synchronization precision without requiring complete system redesign.
Solution Approach 2:
The patent creates a universal synchronization mechanism that can handle multiple channels simultaneously. The phase calibration system is designed to work across all channels with a unified approach, adjusting each channel's sampling phase to achieve synchronized triggering, thus enabling multi-channel control while maintaining precision through a scalable universal solution.
Data Source
AI summary
The present application discloses a quantum bit control signal delay calibration method and a related device, which are applied to the technical field of signal calibration, and include: sampling the trigger signal at a signal receiving end at a preset sampling interval to obtain a sampling value; the trigger interval being an integral multiple of the sampling interval; counting effective sampling values in each trigger interval, comparing the number of the effective sampling values corresponding to each trigger interval with a nominal value, counting the number of fuzzy trigger intervals inconformity with the nominal value in a plurality of trigger intervals, and recording it as a sampling fuzzy severity; after the sampling fuzzy severity is recorded once, adjusting sampling time of the sampling according to a preset delay step length, to obtain the sampling fuzzy severity corresponding to a plurality of delay values, and generating a fuzzy severity quantization sequence.