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Showing 2025 · quant-phShow all
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quant-ph2025
Hybrid Cramér-Rao bound for Quantum Bayes-Point Estimation with Nuisance Parameters
Jianchao Zhang, Jun Suzuki
We develop a hybrid framework for quantum parameter estimation in the presence of nuisance parameters. In this Bayes-point scheme, the parameters of interest are treated as fixed n…
quant-ph2025
Phase Transitions and Noise Robustness of Quantum Graph States
Tatsuya Numajiri, Shion Yamashika, Tomonori Tanizawa +3
Graph states are entangled states that are essential for quantum information processing. As experimental advances enable the realization of large-scale graph states, efficient fide…
quant-ph2025★ 6 cited
Encrypted Qubits can be Cloned
Koji Yamaguchi, Achim Kempf
We show that encrypted cloning of unknown quantum states is possible. Any number of encrypted clones of a qubit can be created through a unitary transformation, and each of the enc…