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quant-ph2026
Rank and Range Criteria for Mixed-State Determination from Local Marginals
Xinyu Qiu, Minglong Qin, Caohan Cheng +2
Determining whether a mixed quantum state is uniquely determined among all states by its k-body marginals (k-UDA) is a fundamental problem in quantum system certification. We devel…
quant-ph2025
Mixed States Uniquely Determined by Marginals and Additivity
Xinyu Qiu, Lin Chen, Genwei Li +1
Identifying whether a mixed quantum state is uniquely determined among all states (UDA) by its local marginals is a basic problem in quantum information theory. We establish necess…
quant-ph2024
Device-independent quantum state discrimination
Xinyu Qiu, Lin Chen
Quantum state discrimination depicts the general progress of extracting classical information from quantum systems. We show that quantum state discrimination can be realized in a d…