Preprint
Sep 2026
Coherent error threshold for quantum LDPC codes
A key appeal of quantum low-density parity check (qLDPC) codes is their ability to suppress stochastic Pauli noise below nonzero thresholds. Coherent errors are fundamentally different: they produce superpositions of error patterns whose amplitudes can interfere even after syndrome measurement. Rigorous understanding o...
Zhen Han, Yuan-Yuan Zhao, Yijia Xu et al.
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