Quantum Error Filtering Code for Parity-Based Circuit Error Removal
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Solution Overview
Problem
Conventional quantum error correction codes only correct the output of quantum circuits while maintaining the circuits with errors, which is inefficient.
Innovation Solution
A quantum error filtering method and device using a quantum error filtering code that includes an encoder to output logical qubits as physical qubits and a filter to detect errors based on parities measured from physical qubits, allowing for efficient detection and removal of quantum errors in quantum circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional quantum error correction code is used to correct output of quantum circuit, then quantum error can be detected and corrected, but the quantum circuit itself is maintained with errors which reduces efficiency
Solution Approach 1:
The patent applies preliminary action by encoding logical qubits with quantum error filtering code before they enter the quantum circuit. This pre-encoding allows errors to be filtered out at the input stage rather than correcting them after computation, thereby maintaining circuit integrity and improving overall computing efficiency while ensuring reliability
2Device complexity
If quantum error correction is performed on output only, then the quantum circuit structure is maintained, but error detection and correction efficiency is low
Solution Approach 1:
The patent introduces an intermediary quantum error filtering code that acts as a mediator between the classical control system and the quantum circuit. This code transforms error detection and correction into an efficient filtering process at the input stage, improving productivity without increasing device complexity
Data Source
AI summary
Provided is a method and device for quantum error filtering using a quantum error filtering code that may encode a quantum state for input data, may output, to a quantum circuit, a plurality of logical qubits each implemented as a plurality of physical qubits based on a predefined quantum error filtering code, and may detect a quantum error in one of the input logical qubits based on parities measured from the physical qubits for the logical qubits input through the quantum circuit.