Dynamic Quantum Pulse Routing With Shared Pulser Circuits
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Solution Overview
Problem
Conventional quantum computer control systems face limitations in dynamically generating and routing pulses for quantum algorithms, leading to inefficiencies in qubit manipulation and increased resource requirements as the number of qubits increases.
Innovation Solution
A modular and dynamic quantum controller system with pulser circuits and shared circuitry that can generate and route pulses based on real-time analysis of inbound signals, allowing for flexible assignment of pulse generation tasks among multiple qubits, reducing latency and resource needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional quantum computer control systems are used, then pulse generation and routing can be performed, but the system requires more resources and has higher latency as the number of qubits increases
Solution Approach 1:
The patent implements a shared pulser circuit that can be dynamically assigned to different qubits based on real-time algorithm requirements. Instead of having dedicated pulsers for each qubit, a single pulser circuit serves multiple qubits by receiving inbound signals from quantum processing units and dynamically routing pulse generation tasks, thereby reducing the total number of pulsers needed while maintaining full functionality across all qubits
Solution Approach 2:
The system employs dynamic pulse routing where the pulser circuit's assignment to different qubits changes in real-time based on the quantum algorithm being executed. The controller dynamically determines which qubit should receive pulse generation services at any given moment, allowing flexible resource allocation that adapts to changing computational requirements rather than being statically assigned
2Loss of time
If conventional quantum computer control systems are used, then qubit manipulation can be performed, but latency is increased
Solution Approach 1:
The system incorporates real-time feedback mechanisms where the controller receives inbound signals from quantum processing units indicating current qubit states and algorithm progression. Based on this feedback, the controller dynamically adjusts pulse routing decisions and pulser assignments, optimizing timing to minimize latency while responding to actual system conditions rather than following predetermined static schedules
Solution Approach 2:
The controller performs preliminary analysis of inbound signals to determine optimal pulser assignments before actual pulse generation occurs. By pre-determining the best pulser to handle upcoming pulse generation tasks based on anticipated requirements and current system state, the system reduces decision-making latency during critical pulse execution windows
Data Source
AI summary
A quantum controller comprises raw pulse generation circuitry, pulse modification circuitry, and output management circuitry. The raw pulse generation circuitry is operable to generate a raw output pulse. The output management circuitry is operable to route one or more output pulses onto a selected one or more signal paths based on to which one or more of a plurality of elements of a quantum processor the one or more output pulses are to be sent. The pulse modification circuitry is operable to select pulse modification settings to use for processing of the raw output pulse, wherein the selection is based on which of the signal paths are selected and/or to which elements of a quantum processor the pulses are to be sent. The pulse modification circuitry is operable to process the raw pulse using the selected pulse modification settings to generate the output pulses.