Quantum Controller Frequency Generation for Phase-Continuous Hops
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Solution Overview
Problem
Conventional frequency generation methods in quantum computer control systems face limitations in precision and efficiency, particularly in maintaining phase continuity across frequency hops and supporting higher output sample rates, which hinders the performance of quantum algorithms.
Innovation Solution
The implementation of a quantum controller architecture that includes frequency generation circuitry with CORDIC circuits, phase generation, and S-matrix generation, enabling concurrent generation of multiple frequencies and phase continuity through timestamp-based calculations and matrix rotations, and supporting higher sample rates by using multiple CORDICs and S-matrices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional frequency generation methods are used, then device complexity is reduced, but measurement precision and manufacturing precision deteriorate due to inability to maintain phase continuity across frequency hops
Solution Approach 1:
The frequency generation circuitry is segmented into multiple specialized components: CORDIC circuits for coordinate rotation and frequency synthesis, phase generation units for maintaining phase continuity, and S-matrix generation units for quantum state manipulation. Each segment handles a specific aspect of frequency generation, enabling high precision phase continuity while keeping individual components manageable in complexity.
Solution Approach 2:
Timestamp-based calculations serve as an intermediary mechanism that coordinates frequency hops across different CORDIC circuits. By using timestamps as a reference, the system maintains phase continuity without requiring direct complex interconnections between all frequency generation components, thus resolving the contradiction between precision and complexity.
2Productivity
If conventional frequency generation methods are used, then device complexity is reduced, but productivity deteriorates due to inability to support higher output sample rates
Solution Approach 1:
Multiple CORDIC circuits operate in parallel to generate different frequencies simultaneously, enabling higher output sample rates. Each CORDIC circuit handles a specific frequency channel, and the timestamp-based coordination mechanism synchronizes them without creating bottlenecks, thus achieving high productivity while managing complexity through functional segmentation.
Solution Approach 2:
The system pre-generates S-matrices and phase information using timestamp-based calculations before quantum operations are executed. This preliminary preparation of frequency and phase data allows the quantum controller to operate at higher sample rates without real-time computational bottlenecks, improving productivity while keeping the runtime device complexity manageable.
3Loss of time
If conventional frequency generation methods are used, then ease of operation is improved, but loss of time increases due to latency in frequency hops and phase discontinuities
Solution Approach 1:
Timestamp-based calculations act as an intermediary that automatically coordinates frequency hops and maintains phase continuity across CORDIC circuits. This eliminates the need for manual phase tracking and reduces latency by providing a unified time reference that synchronizes all frequency generation operations, thus reducing time loss while maintaining ease of operation.
Solution Approach 2:
The patent replaces manual or software-based frequency hopping control with hardware-based CORDIC circuits that perform coordinate rotation and frequency synthesis in parallel. This substitution of mechanical/software control with dedicated hardware circuits reduces latency in frequency hops while maintaining operational simplicity through automated timestamp-based coordination.
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.