3 papers
quant-ph2025
Quantum Error Correction near the Coding Theoretical Bound
Daiki Komoto, Kenta Kasai
Recent progress in quantum computing has enabled systems with tens of reliable logical qubits, built from thousands of noisy physical qubits. However, many impactful applications d…
quant-ph2025
Sharp Error-Rate Transitions in Quantum QC-LDPC Codes under Joint BP Decoding
Daiki Komoto, Kenta Kasai
In this study, we report that quantum quasi-cyclic low-density parity-check codes decoded via joint belief propagation (BP) exhibit steep error-rate curves, despite the presence of…
cs.IT2025
Explicit Construction of Quantum Quasi-Cyclic Low-Density Parity-Check Codes with Column Weight 2 and Girth 12
Daiki Komoto, Kenta Kasai
This study proposes an explicit construction method for quantum quasi-cyclic low-density parity-check (QC-LDPC) codes with a girth of 12. The proposed method designs parity-check m…