Quantum Control Pulse Multiplexing for Low-Latency Classical Processing
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Solution Overview
Problem
Conventional quantum computer control systems face limitations in efficiently generating precise quantum control pulses due to resource constraints and latency issues, particularly when dealing with complex algorithms requiring dynamic pulse generation and routing.
Innovation Solution
A scalable quantum controller architecture with pulser circuits and shared circuitry that enables flexible pulse generation and routing, allowing for dynamic assignment of quantum control operations across multiple qubits, reducing latency and resource requirements through time and frequency division multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional quantum control systems use dedicated control circuits for each qubit, then control precision is maintained, but device complexity and resource requirements increase significantly
Solution Approach 1:
The patent implements a universal quantum control system where a single control circuit can dynamically serve multiple qubits through time-division and frequency-division multiplexing. The control circuit generates and routes control signals to different qubits at different time slots and frequency channels, eliminating the need for dedicated control circuits for each qubit while maintaining control precision.
Solution Approach 2:
The patent segments the control signal generation into discrete time slots and frequency channels. By dividing the control timeline into segments assigned to different qubits and using frequency division to multiplex multiple control signals, the system achieves precise control of multiple qubits using shared resources rather than dedicated circuits.
2Adaptability or versatility
If conventional systems generate control pulses in real-time for each quantum operation, then dynamic control is achieved, but latency increases
Solution Approach 1:
The patent pre-generates and stores control pulse sequences in a pulse sequence generator before they are needed for quantum operations. By preparing control pulses in advance and storing them in memory, the system eliminates real-time generation latency while maintaining the ability to dynamically select and execute appropriate pulse sequences based on quantum operation requirements.
3Adaptability or versatility
If quantum controllers are deployed in cloud-hosted architectures, then accessibility and scalability improve, but resource constraints and control latency worsen
Solution Approach 1:
The patent merges multiple quantum control functions into a single integrated quantum controller that can manage multiple qubits simultaneously. By combining pulse generation, signal routing, and control logic into one unified device, the system reduces the overall resource footprint and enables cloud-hosted deployment while maintaining efficient control of quantum processors.
Data Source
AI summary
Methods and systems for classical processing in a quantum controller.