2017 - T3 -  WS1 - Operator algebras and quantum information theory

Collection 2017 - T3 - WS1 - Operator algebras and quantum information theory

Organisateur(s) Collins, Benoît ; Junge, Marius ; Xu, Quanhua
Date(s) 11/09/2017 - 15/09/2017
URL associée https://web.archive.org/web/20201010200043/https://sites.google.com/site/analysisqit2017/main-events/workshop1
00:00:00 / 00:00:00
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Positivity of multi-linear maps and applications to quantum information theory

De Seung-Hyeok Kye

In this talk, we use the duality between n-partite separable states and positive multi-linear maps with n-1 variables, to give a necessary criterion for three qubit separability in terms of diagonal and anti-diagonal entries. If all the entries are zero except for diagonal and anti-diagonal entries, then our characterization is also sufficient for separability. Many important classes of three qubit states like Greenberger-Horne-Zeilinger diagonal states are in this class. We give the characterization in terms of a norm in the four dimensional complex spaces. We also exhibit examples of non-decomposable positive bi-linear maps which generate exposed rays in the cone of all positive bi-linear maps in 2x2 matrices. The exposedness enables us to detect three qubit PPT entanglement of nonzero volume.

Informations sur la vidéo

  • Date de captation 15/09/2017
  • Date de publication 20/09/2017
  • Institut IHP
  • Licence CC BY-NC-ND
  • Langue Anglais
  • Format MP4

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