J 2013

Bipartite entanglement-annihilating maps: Necessary and sufficient conditions

FILIPPOV, Sergey and Mário ZIMAN

Basic information

Original name

Bipartite entanglement-annihilating maps: Necessary and sufficient conditions

Authors

FILIPPOV, Sergey (643 Russian Federation) and Mário ZIMAN (703 Slovakia, belonging to the institution)

Edition

Physical Review, COLLEGE PK, AMER PHYSICAL SOC, 2013, 1050-2947

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10301 Atomic, molecular and chemical physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 2.991

RIV identification code

RIV/00216224:14330/13:00080248

Organization unit

Faculty of Informatics

DOI

UT WoS

000324393600006

Keywords in English

entaglement; entanglement-annihilating channels
Změněno: 22/5/2015 06:09, RNDr. Pavel Šmerk, Ph.D.

Abstract

V originále

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. The robustness of some entangled states is discussed.