5-Qubit Quantum Encoding Circuit with Minimal Gate Depth

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Solution Overview

Problem

Existing quantum error correction encoding methods require extensive operations and are limited by the types of operations supported by the hardware platform, making it challenging to perform efficient quantum computing.

Innovation Solution

A quantum encoding circuit is designed with a minimal circuit depth, utilizing a combination of CNOT gates, rotation gates, and CZ gates to perform 5-qubit error correction encoding, even in environments where operation types are limited.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional quantum error correction encoding methods are used, then error correction capability is achieved, but the number of operations increases and efficiency decreases

Engineering Contradiction:

Improveerror correction capabilityVSAvoidquantum computing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the parameters of the quantum circuit by optimizing the sequence and type of gates (CNOT, rotation gates, CZ gates) to achieve minimal circuit depth. This parameter optimization reduces the total number of operations while maintaining the 5-qubit error correction encoding capability, thereby resolving the contradiction between reliability and productivity.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If comprehensive operation types are used for encoding, then encoding flexibility is improved, but device complexity increases when hardware has limited operation support

Engineering Contradiction:

Improveencoding flexibilityVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs a universal quantum encoding circuit that can operate with limited gate types (CNOT, rotation gates, CZ gates) while maintaining encoding flexibility. The circuit structure is designed to be adaptable to hardware constraints, achieving multi-functionality with a minimal gate set, thus resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If more operations are performed to ensure accurate encoding, then encoding accuracy is improved, but operation time increases

Engineering Contradiction:

Improveencoding accuracyVSAvoidoperation time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent implements preliminary action by pre-optimizing the quantum circuit structure with minimal depth before execution. The encoding circuit is designed in advance to achieve accurate encoding with the fewest possible operations, avoiding unnecessary intermediate steps. This preliminary optimization resolves the contradiction between encoding accuracy and operation time.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250200418A1Quantum encoding circuit for 5-qubit error correcting code

Publication Date: 2025.06.19 ELECTRONICS & TELECOMM RES INST

AI summary

Disclosed are quantum circuits, and more particularly, to a quantum encoding circuit for a 5-qubit error correction code. A quantum encoding circuit for a 5-qubit error correction code according to one embodiment of the present document can be implemented with a circuit comprising rotation gate(s), CNOT gate(s), and CZ gate(s). A quantum encoding circuit for a 5-qubit error correction code according to another embodiment of the present document can be implemented with a circuit comprising rotation gate(s) and CZ gate(s), without CNOT gates.