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  • We fully characterize bipartite entanglement-annihilating (EA) channels that destroy entanglement of any state shared by subsystems and, thus, should be avoided in any entanglement-enabled experiment. Our approach relies on extending the problem to EA positive maps, the cone of which remains invariant under concatenation with partially positive maps. Due to this invariancy, positive EA maps adopt a well characterization and their intersection with completely positive trace-preserving maps results in the set of EA channels. In addition to a general description, we also provide sufficient operational criteria revealing EA channels. They have a clear physical meaning since the processes involved contain stages of classical information transfer for subsystems. We demonstrate the applicability of derived criteria for local and global depolarizing noises, and specify corresponding noise levels beyond which any initial state becomes disentangled after passing the channel.
  • We fully characterize bipartite entanglement-annihilating (EA) channels that destroy entanglement of any state shared by subsystems and, thus, should be avoided in any entanglement-enabled experiment. Our approach relies on extending the problem to EA positive maps, the cone of which remains invariant under concatenation with partially positive maps. Due to this invariancy, positive EA maps adopt a well characterization and their intersection with completely positive trace-preserving maps results in the set of EA channels. In addition to a general description, we also provide sufficient operational criteria revealing EA channels. They have a clear physical meaning since the processes involved contain stages of classical information transfer for subsystems. We demonstrate the applicability of derived criteria for local and global depolarizing noises, and specify corresponding noise levels beyond which any initial state becomes disentangled after passing the channel. (en)
Title
  • Bipartite entanglement-annihilating maps: Necessary and sufficient conditions
  • Bipartite entanglement-annihilating maps: Necessary and sufficient conditions (en)
skos:prefLabel
  • Bipartite entanglement-annihilating maps: Necessary and sufficient conditions
  • Bipartite entanglement-annihilating maps: Necessary and sufficient conditions (en)
skos:notation
  • RIV/00216224:14330/13:00080248!RIV15-MSM-14330___
http://linked.open...avai/riv/aktivita
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  • RIV/00216224:14330/13:00080248
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  • entaglement; entanglement-annihilating channels (en)
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  • US - Spojené státy americké
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  • 88
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  • Filippov, Sergey
  • Ziman, Mário
http://linked.open...ain/vavai/riv/wos
  • 000324393600006
issn
  • 1050-2947
number of pages
http://bibframe.org/vocab/doi
  • 10.1103/PhysRevA.88.032316
http://localhost/t...ganizacniJednotka
  • 14330
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