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20242026
most citedHolevo Cramér-Rao bound: How close can we get without entangling measurements?

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quant-ph2026

Deciding the Attainability of the Multiparameter Quantum Fisher Information is NP-Hard

Lorcan O. Conlon, Laura Shou, V Vijendran +7

The quantum Fisher information (QFI) sets a fundamental bound on the attainable precision when estimating multiple parameters simultaneously. Incompatibility among the individually…

quant-ph2026

OQMD: Single-Qubit Rotation Control Improves Low-CNOT Multiclass Quantum Classification

Michael A. Magid, Melissa Zeynep Ertem, Jun Suzuki

Near-term variational classifiers incur substantial error and latency from two-qubit gates, yet practitioners often assume that additional entangling depth is the default route to…