321 citations
- University of BonnDE9 papers
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- Max Planck Institute for Mathematics in the SciencesDE5 papers
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4 papers · 2 filters
Local Equivalence of Rank-Two Quantum Mixed States
Sergio Albeverio, Shao-Ming Fei, Debashish Goswami
We investigate the equivalence of quantum mixed states under local unitary transformations. For a class of rank-two mixed states, a sufficient and necessary condition of local equi…
Concurrence and a proper monogamy inequality for arbitrary quantum states
Yong-Cheng Ou, Heng Fan, Shao-Ming Fei
We obtain an analytical lower bound of entanglement quantified by concurrence for arbitrary bipartite quantum states. It is shown that our bound is tight for some mixed states and…
Addendum to "Multipartite states under local unitary transformations"
Sergio Albeverio, Laura Cattaneo, Shao-Ming Fei +1
In previous work the authors introduced a notion of generic states and obtained criteria for local equivalence of them. Here they introduce the concept of CHG states maintaining th…
Entanglement conditions for multi-mode states
Zong-Guo Li, Shao-Ming Fei, Zhi-Xi Wang +1
We provide a class of inequalities for detecting entanglements in multi-mode systems. Necessary conditions for fully separable, bi-separable and sufficient conditions for fully ent…