Quantum Trigger Synchronization with Equal-Length Signal Routing
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Solution Overview
Problem
The challenge of achieving synchronous triggering of manipulation, measurement, and reading operations on multiple qubits in quantum chips, particularly with increasing numbers of qubits, is exacerbated by complex signal wiring and data throughput demands, leading to reduced accuracy and unsynchronized operations.
Innovation Solution
A synchronous triggering system involving a central control device, routing boards, and functional boards with AND-gate chips ensures simultaneous triggering by adjusting initial time points and using equal-length communication lines, facilitated by a reference clock, to synchronize data-processing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of qubits on quantum chips increases to hundreds or tens of thousands, then the computing power and functionality of the quantum system are improved, but the signal wiring becomes more and more complex and the number of functional modules increases, making synchronous triggering difficult to achieve
Solution Approach 1:
The system divides the quantum control system into multiple functional boards, each responsible for controlling a subset of qubits. Each functional board contains dedicated data-processing devices that handle triggering signals independently. This segmentation allows the system to scale to hundreds or thousands of qubits while maintaining manageable complexity within each board, as each board only needs to handle a portion of the total signal routing and synchronization.
2Adaptability or versatility
If multiple functional modules manipulate and measure multiple qubits, then the operational capability of the quantum system is improved, but it becomes difficult to guarantee that triggers are completely synchronous when qubits are manipulated, measured and read
Solution Approach 1:
The system performs preliminary calibration of triggering signals by sending test signals through the entire signal path and measuring the actual arrival times at each data-processing device. Based on these measurements, the system pre-adjusts the initial time points of triggering signals to compensate for path length differences. This preliminary action ensures that when actual quantum operations are performed, all triggers arrive synchronously at their respective devices, maintaining high measurement precision despite the complex multi-module architecture.
3Adaptability or versatility
If more signals are needed to manipulate, measure and read qubits on large-scale quantum chips, then the control capability is improved, but the data throughput increases exponentially, requiring a huge number of channels that existing functional board structures cannot meet
Solution Approach 1:
The system transitions from a centralized control architecture to a distributed multi-board architecture, adding a spatial dimension to the control system. Multiple functional boards are arranged in parallel, each handling a subset of qubit control signals. This dimensional change allows the system to scale data throughput linearly with the number of boards rather than requiring exponential growth in channels per board, as each board operates semi-independently with its own data-processing devices and signal routing.
Data Source
AI summary
Disclosed are a synchronous triggering system, a quantum control system and a quantum computer. The synchronous triggering system comprises a central control device, several routing boards and several functional boards. It guarantees the synchronous triggering of the triggering signals by means of a three-stage triggering synchronization system. In the first stage, the central control device provides several sets of triggering signals to corresponding routing boards, and adjusts an initial time point for each set of triggering signals to output so that each chassis receives the triggering signals concurrently. In the second stage, communication lines from each routing board to the several functional boards are of equal length. In the third stage, the triggering signals arrive at several data-processing devices simultaneously after being processed under the AND-operation of an AND-gate chip.