4 papers
Separability criteria and lower bounds of entanglement via realignment
Yuhang Xie, Yanjun Chu, Shao-Ming Fei
The detection and quantification of quantum entanglement are central problems in quantum information science. Based on the realignment of density matrices and the vectorization of…
Imaginarity witnessing enhancement via spectral norms of witnesses
Yuhang Xie, Yanjun Chu, Yushan Ding +1
Quantum imaginarity is an essential physical resource that underpins key functionalities of modern quantum technologies. We improve imaginarity witnessing via the prior knowledge o…
Quantum-state block texture and its quantification
Yanjun Chu, Yuhang Xie, Chenyang Cui +1
Quantum-state texture (QST) is an emerging quantum resource that has garnered increasing attention amid advances in quantum theory. In this work, we generalize the QST to quantum-s…
Identifying local unitary equivalence based on reduction of quantum states
Yanjun Chu, Chenyang Cui, Yuhang Xie +2
Local unitary equivalence is central to entanglement quantification and classification. Identifying the local unitary equivalence remains a formidable challenge. We address this pr…