Purification and redistribution of entanglement via single local filtering

The effect of filtering operation with respect to purification and concentration of entanglement in quantum states are discussed in this paper. It is shown, through examples, that the local action of the filtering operator on a part of the composite quantum state allows for purification of the remai...

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Bibliographic Details
Published in:arXiv.org 2014-05
Main Authors: Yashodamma, K O, Geetha, P J, Sudha
Format: Article
Language:English
Subjects:
Alliances
Entanglement
Filtration
Purification
Quantum theory
Subsystems
Online Access:Get full text
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Summary:The effect of filtering operation with respect to purification and concentration of entanglement in quantum states are discussed in this paper. It is shown, through examples, that the local action of the filtering operator on a part of the composite quantum state allows for purification of the remaining part of the state. The redistribution of entanglement in the subsystems of a noise affected state is shown to be due to the action of local filtering on the non-decohering part of the system. The varying effects of the filtering parameter, on the entanglement transfer between the subsystems, depending on the choice of the initial quantum state is illustrated.
ISSN:2331-8422
DOI:10.48550/arxiv.1306.1806