Quantum Display Control Device for Multi-Qubit Parity Representation

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Solution Overview

Problem

Existing techniques for representing quantum computing problems, such as those involving quantum annealing, primarily focus on two coupled nodes and do not effectively represent the coupling of three or more quantum bits.

Innovation Solution

A display control device and method that generate data for displaying variable nodes indicating the state of at least three quantum bits, parity nodes representing the parity of these quantum bits, and edges coupling the variable and parity nodes, enabling the representation of three or more quantum bits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing techniques are used to represent quantum computing problems, then two coupled nodes can be represented, but the coupling of three or more quantum bits cannot be effectively represented

Engineering Contradiction:

Improvecapability to represent quantum bit couplingVSAvoidrepresentation structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the representation of multi-qubit coupling by introducing intermediate parity check nodes. Instead of directly representing complex multi-qubit couplings, the system divides them into smaller two-qubit coupling units connected through parity nodes, making the representation manageable and compatible with existing two-qubit frameworks.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces parity check nodes as intermediary elements that mediate between variable nodes representing quantum bits. These parity nodes enable the representation of multi-qubit couplings by acting as intermediate connection points, allowing complex couplings to be expressed through sequences of simpler two-qubit interactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If only two coupled nodes are represented, then the representation structure remains simple, but the capability to represent three or more quantum bits coupling is limited

Engineering Contradiction:

Improvequantum bit coupling representation capabilityVSAvoidmulti-qubit coupling information

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent adds a new dimensional aspect to the representation by introducing parity check nodes as a separate layer in the graph structure. This transforms the representation from simple direct couplings to a multi-layered structure where parity nodes provide an additional dimension for encoding multi-qubit coupling information.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent merges multiple two-qubit coupling relationships into a unified multi-qubit coupling representation by combining them through shared parity nodes. This allows the system to represent complex multi-qubit interactions while maintaining the simplicity of individual two-qubit building blocks.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250148665A1Display control device, computing system, and display control method

Publication Date: 2025.05.08 NEC CORP

AI summary

A display control device generates data for displaying at least three variable nodes, wherein each variable node indicates a state of each of at least three quantum bit, parity node indicating a parity of the at least three quantum bits, and edges coupling between each variable nodes and the parity node.