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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…