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This study presents a scalable framework for fermion-to-qubit mappings that achieves arbitrary code distance without increasing stabilizer weights, overcoming a key limitation in quantum error correction. By embedding low-distance encodings into surface codes via topological defects, the research establishes optimal relationships between code distance and operator weights across one- and two-dimensional systems. The introduction of Perforated Encodings further demonstrates the method's versatility when applied to other topological structures like color codes.
Encoding Fermions to Qubits Now Scales to Any Code Distance

New research details a scalable framework for fermion-to-qubit mappings, achieving arbitrary code distance without increasing stabilizer weights.
Researchers at IQM Quantum Computers and the Universidad Autónoma de Madrid have achieved arbitrary code distance in fermion-to-qubit encodings, a development published on September 30, 2026, in…
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