RT Journal Article T1 Implementing Quantum Polar Codes in a Superconducting Processor: From State Preparation to Decoding A1 Kurniawan, Handy A1 Savin, Valentin A1 G. Almudéver, Carmen A1 García Herrero, Francisco Miguel AB Quantum polar codes are a class of capacity-achieving quantum codes, with fast and efficient error syndrome decoding for Pauli channels, emerging as a promising approach to fault-tolerant quantum computation. However, their implementation on superconducting quantum hardware with connectivity constraints is hindered by the need for long-range qubit interactions, which increases CNOT gate usage and reduces fidelity. A full-stack software framework for implementing quantum polar codes is presented, integrating a noise-aware compilation approach that optimizes resource usage by combining quantum and classical software. Experimental results demonstrate significant improvements in logical state preparation rates, with resource savings from 10% to 81% for both quantum and classical computations. YR 2025 FD 2025-05-16 LK https://hdl.handle.net/20.500.14352/120219 UL https://hdl.handle.net/20.500.14352/120219 LA eng NO Kurniawan H, Savin V, Almudéver CG, Herrero FG. Implementing Quantum Polar Codes in a Superconducting Processor: From State Preparation to Decoding. IEEE Softw 2025; : 1–8. [DOI: 10.1109/MS.2025.3569447] NO This work was supported by the QuantERA project EQUIP (grants PCI2022-133004 and PCI2022-132922, funded by the AEI, Ministerio de Ciencia e Innovación, Gobierno de España, MCIN/AEI/10.13039/501100011033, and ANR-22- QUA2-0005-01, funded by the Agence Nationale de la Recherche, France), and by the European Union “NextGenerationEU/PRTR”. This research is part of the project PID2023-147059OB-I00 funded by MCIU/AEI/10.13039/501100011033/FEDER, UE.HK acknowledges support from the Comunidad de Madrid under grant number PIPF-2023/COM-30051. CGA acknowledges support from the Spanish Ministry of Science, Innovation, and Universities through the Beatriz Galindo program 2020 (BG20-00023) and the European ERDF PID2021-123627OB-C51. We acknowledge the use of IBM Quantum services for this work. The views expressed are those of the authors and do not reflect the official policy or position of IBM or the IBM Quantum team NO Ministerio de Ciencia e Innovación y Universidades (España) NO European Union NO Comunidad de Madrid NO IBM Quantum DS Docta Complutense RD 19 dic 2025