Author

Yuan-Yuan Zhao

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Preprint Sep 2026

Single-shot state preparation threshold: rigorous theorem and statistical mechanical mapping

Preparing logical codewords with a single round of noisy syndrome measurements can reduce the time overhead of fault-tolerant quantum computation. It remains unclear which structural properties of the code suffice to guarantee a threshold for single-shot state preparation. Here we prove that linear confinement suffices...

Yuan-Yuan Zhao, Yi-Zheng Yuan, Zhen Han et al. · 0 citations

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, Yi-Jia Xu et al. · 0 citations