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Author

Shuheng Liu

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Preprint Aug 2026

Qutrit entanglement and joint multi-parameter estimation in an optical clock platform

Quantum metrology harnesses entanglement to improve measurement precision beyond classical limits. While standard protocols rely on two-level qubits to estimate a single parameter, extending them to entangled multi-level qudits enables the optimal simultaneous estimation of multiple parameters within a single probe. Ho...

Ohad Lib, Shuheng Liu, Maximilian Ammenwerth et al. · 0 citations
Preprint Aug 2026

Entanglement certification via causal-order interferometry in a quantum switch

Entanglement certification is often performed on states that have already undergone noisy transmission or processing. Noise can reduce the surviving entanglement and can also cause a given criterion to fail even when entanglement remains. In this context, the quantum switch, a paradigmatic realization of indefinite cau...

Haojie Wang, Shuheng Liu, Qiongyi He · 0 citations

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