Quantum Controller Program Loading with Real-Time Qubit Calibration

Solution Overview

Problem

Conventional methods for program loading in quantum computers face challenges due to hardware drift and limited memory, leading to inefficiencies in calibration time and utilization, particularly in cloud or data center environments where maximizing resource utilization is crucial.

Innovation Solution

Implementing a quantum controller with a hardware offload mechanism and look-up table (LUT) to pre-load pulse processor programs, stream data, and extend memory capacity, enabling fast program loading and execution by utilizing external resources like external RAM and classical computers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional program loading methods are used in quantum computers, then the system structure remains simple, but calibration time increases and resource utilization decreases

Engineering Contradiction:

Improveresource utilizationVSAvoidcalibration time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent implements a hardware offload mechanism with a look-up table that pre-loads pulse processor programs into external RAM before they are needed for execution. This preliminary action stores calibration data and program instructions in advance, allowing the quantum controller to quickly retrieve and execute programs without performing time-consuming calibration operations during active use, thereby reducing calibration time and improving resource utilization.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces external RAM as an intermediary component between the quantum controller and the pulse processor. This external memory system acts as a buffer that holds pre-loaded programs and calibration data, mediating the data transfer between the controller and processor. The intermediary external RAM enables fast program loading and reduces the time the quantum computer spends in calibration mode, thus improving productivity while managing the complexity of the extended memory system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If external RAM is used to extend memory capacity, then program loading speed increases, but device complexity increases

Engineering Contradiction:

Improveprogram loading speedVSAvoidmemory system complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent introduces external RAM as an intermediary component between the quantum controller and the pulse processor. This external memory system acts as a buffer that holds pre-loaded programs and calibration data, mediating the data transfer between the controller and processor. The intermediary external RAM enables fast program loading and reduces the time the quantum computer spends in calibration mode, thus improving productivity while managing the complexity of the extended memory system.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The memory system is segmented into multiple components: internal controller memory, external RAM, and a look-up table. This segmentation allows each component to serve a specific function - the look-up table stores program identifiers and parameters, the external RAM holds the actual pulse programs and calibration data, and the controller manages data retrieval. By dividing the memory system into specialized segments, the patent achieves high-speed program loading while organizing the complexity into manageable, functionally distinct parts.

Inventive Principle:

Principle #1Segmentation

3Loss of time

If hardware offload mechanism with look-up table is implemented, then calibration time is reduced, but device complexity increases

Engineering Contradiction:

Improvecalibration timeVSAvoidcontroller architecture complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent implements a hardware offload mechanism with a look-up table that pre-loads pulse processor programs into external RAM before they are needed for execution. This preliminary action stores calibration data and program instructions in advance, allowing the quantum controller to quickly retrieve and execute programs without performing time-consuming calibration operations during active use, thereby reducing calibration time and improving resource utilization.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The look-up table stores copies of program identifiers, parameters, and pointers to the actual pulse programs in external RAM. Instead of storing complete program sets in the controller's internal memory, the system maintains compact references in the look-up table that point to the full programs in external storage. This copying approach reduces the calibration time by having pre-prepared program references ready for quick access, while the actual program data resides in the external memory system, managing the complexity of the controller architecture.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250371405A1Quantum controller program loading

Publication Date: 2025.12.04 Q M TECH LTD

AI summary

Disclosed herein is a new system and method for loading quantum processor programs. Pulse processors are programmed, in real-time, according to a low-level instruction set to produce microwave pulses that manipulate the states in a quantum processor. The nature of qubits in the quantum processor causes quantum hardware characteristics to drift over time. These qubits undergo small physical changes that may damage the accuracy of the quantum gates, typically due to variation of temperature, or energy in the quantum hardware. This new system and method for loading quantum processor programs enables qubit calibration and the adjustment of the quantum hardware in real-time according to immediate feedback from one program to another.