2 papers
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-ph2024
The construction of multiqubit unextendible product bases
Caohan Cheng, Lin Chen
The unextendible orthogonal matrices (UPBs) can be used for various problems in quantum information. We provide an algorithm to check if two UPBs are non-equivalent to each other.…