W-like bound entangled states and secure key distillation

Remigiusz Augusiak; Paweł Horodecki

doi:10.1209/0295-5075/85/50001

W-like bound entangled states and secure key distillation

Abstract

We construct multipartite entangled states with underlying W-type structuresatisfying positive partial transpose (PPT) condition under any (N −1)|1 partition. Then we showhow to distill a N-partite secure key from the states using two different methods: direct applicationof local filtering and novel random key distillation scheme in which we adopt the idea from recentresults on entanglement distillation. Open problems and possible implications are also discussed.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: EPL-EUROPHYS LETT no. 85, pages 0 - 6,
ISSN: 0295-5075
Language:: English
Publication year:: 2009
Bibliographic description:: Augusiak R., Horodecki P.: W-like bound entangled states and secure key distillation// EPL-EUROPHYS LETT. -Vol. 85, nr. Nr. 5, March (2009), s.0-6
DOI:: Digital Object Identifier (open in new tab) 10.1209/0295-5075/85/50001
Verified by:: Gdańsk University of Technology