Author

Liang Jiang

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Preprint Sep 2026

Learning sparse quantum states from single-qubit measurements

We study the problem of learning a sparse quantum state, an $n$-qubit quantum state whose density matrix has at most $s$ nonzero matrix entries in an unknown product basis. While such states admit compact classical descriptions, they can carry long-range entanglement that prevents reconstruction from local reduced dens...

Su-un Lee, Liang Jiang, Kunal Sharma · 0 citations

Open access Aug 2024

Entanglement-enhanced learning of quantum processes at scale

Learning unknown noise processes in quantum systems reveals their physical origin and informs error suppression, mitigation, and correction. Characterizing a general quantum process requires exponentially many parameters inferred from noncommuting measurements. Because these measurements cannot be performed simultaneou...

A. Seif, Senrui Chen, Swarnadeep Majumder et al. · Nature Communications · 12 citations