A Note on Normal Forms of Quantum States and Separability

Ming Li; Shao-Ming Fei; Zhi-Xi Wang

doi:10.1088/0253-6102/50/6/12

A Note on Normal Forms of Quantum States and Separability

Quantum Physics 2015-05-13 v1

Authors: Ming Li , Shao-Ming Fei , Zhi-Xi Wang

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Abstract

We study the normal form of multipartite density matrices. It is shown that the correlation matrix (CM) separability criterion can be improved from the normal form we obtained under filtering transformations. Based on CM criterion the entanglement witness is further constructed in terms of local orthogonal observables for both bipartite and multipartite systems.

Keywords

entanglement witnesses quantum entanglement quantum correlations

Cite

@article{arxiv.0812.2307,
  title  = {A Note on Normal Forms of Quantum States and Separability},
  author = {Ming Li and Shao-Ming Fei and Zhi-Xi Wang},
  journal= {arXiv preprint arXiv:0812.2307},
  year   = {2015}
}

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8 pages

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