Author

Zhi-Xi Wang

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Preprint Oct 2026

Unitary-accessible coherence-erasure distance: Exact qubit solution and a tight qutrit bound

We introduce the unitary-accessible coherence-erasure distance, which measures the minimum unitary-control cost required to transform a quantum state into an incoherent state without changing its spectrum. The target states are restricted to incoherent states on the same unitary orbit, leading to a geometry different f...

Dong-Ping Xuan, Hua Nan, Zhi-Xi Wang et al. · 0 citations

Open access Sep 2026

Entanglement criteria and bound entanglement identification via local random unitaries

The characterization of high-dimensional states is important for quantum information processing. Here, we propose both linear and nonlinear entanglement criteria for states with unequal local dimensions and show that they offer complementary detection capabilities. These entanglement criteria are further generalized to...

Qiao-Qiao Lv, Jin-Min Liang, Zhi-Xi Wang · Europhysics letters · 0 citations

Open access Sep 2026

Multipartite k‐Entanglement Measures and Coherence

Characterizing the entanglement in multipartite quantum systems remains a central challenge in the theory of quantum entanglement. We establish a comprehensive framework for constructing k$k$ ‐entanglement measures by leveraging bipartite entanglement measures and general m$m$ ‐entanglement measures ( m≤k$m \le k$ ) wi...

Zi-Han Chen, Hui Zhao, Shao-Ming Fei et al. · Advanced Quantum Technologie... · 0 citations