Quantum Controller Frequency Generation With Phase-Continuous Pulses
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Solution Overview
Problem
Conventional frequency generation methods in quantum computer control systems are inefficient and resource-intensive, leading to increased latency and complexity in generating precise quantum control pulses.
Innovation Solution
A quantum controller architecture with shared circuitry and pulser circuits that enable dynamic pulse generation and routing, utilizing signal paths for outbound and inbound pulses, and centralized decision-making to reduce latency and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional frequency generation methods are used in quantum computer control systems, then frequency generation is achieved, but the system becomes inefficient and resource-intensive with increased latency
Solution Approach 1:
The system divides frequency generation into discrete frequency bins, with each bin corresponding to a specific quantum element's resonant frequency. This segmentation allows the controller to efficiently select and generate only the required frequencies rather than processing the entire frequency spectrum, thereby improving efficiency and reducing latency.
Solution Approach 2:
The quantum controller pre-configures frequency bins and associates them with specific quantum elements before operation. This preliminary organization of frequency resources enables rapid selection and generation of control pulses without requiring complex real-time frequency synthesis, thus reducing the time latency in pulse generation.
2Productivity
If conventional frequency generation methods are used, then frequency generation is achieved, but device complexity increases
Solution Approach 1:
The quantum controller implements a universal frequency generation architecture where a single controller unit manages multiple frequency bins and can generate control pulses for multiple quantum elements. This multi-functional design consolidates what would otherwise require multiple separate frequency generation circuits, thereby maintaining full quantum control capability while reducing overall device complexity.
Solution Approach 2:
The patent introduces an intermediary frequency bin structure that acts as a mediator between the quantum controller and the quantum elements. Instead of direct complex frequency synthesis for each element, the controller uses pre-defined frequency bins as intermediaries, simplifying the control architecture while maintaining precise frequency generation capability.
Data Source
AI summary
A system comprises time-tracking circuitry and phase parameter generation circuitry. The time-tracking circuitry is operable to generate a time-tracking value corresponding to time elapsed since a reference time. The phase parameter generation circuitry operable to: receive the time-tracking value; receive a control signal that conveys a frequency parameter corresponding to a desired frequency of an oscillating signal; and generate a plurality of phase parameters used for generation of an oscillating signal, wherein the generation of the plurality of phase parameters is based on the time-tracking value and the frequency parameter such that the oscillating signal maintains phase continuity across changes in the frequency parameter.