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Classification of Mixed Three-Qubit States

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Acín, A., Bruß, D., Lewenstein, M., Sanpera, A.·2001·Physical Review Letters

Abstract

We introduce a classification of mixed three-qubit states, in which we define the classes of separable, biseparable, W, and Greenberger-Horne-Zeilinger states. These classes are successively embedded into each other. We show that contrary to pure W-type states, the mixed W class is not of measure zero. We construct witness operators that detect the class of a mixed state. We discuss the conjecture that all entangled states with positive partial transpose (PPTES) belong to the W class. Finally, we present a new family of PPTES "edge" states with maximal ranks.

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Metadata

Authors
Acín, A., Bruß, D., Lewenstein, M., & Sanpera, A.
Venue
Physical Review Letters
Published
2001-07-03
Volume
87
Issue
4
Pages
040401-040401
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2028965768
Cited by
578
References
17
FWCI
10.51
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Classification of Mixed Three-Qubit States. https://app.cochat.ai/papers/10.1103/physrevlett.87.040401
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Acín, A., Bruß, D., Lewenstein, M., & Sanpera, A. (2001). Classification of Mixed Three-Qubit States. Physical Review Letters. https://doi.org/10.1103/physrevlett.87.040401

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.