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Mixedness and teleportation

Abstract:
We show that on exceeding a certain degree of mixedness (as quantified by the von Neumann entropy), entangled states become useless for teleportation. By increasing the dimension of the entangled systems, this entropy threshold can be made arbitrarily close to maximal. This entropy is found to exceed the entropy threshold sufficient to ensure the failure of dense coding.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.61.040101

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Role:
Author
Journal:
PHYSICAL REVIEW A
Volume:
61
Issue:
4
Pages:
401011-401012
Publication date:
2000-04-05
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:d3ff4367-a3bf-453e-a149-a59b455c4748
Source identifiers:
156233
Local pid:
pubs:156233
Language:
English

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