Entanglement-induced state ordering under local operations

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Authors

ZIMAN Mário BUŽEK Vladimír

Year of publication 2005
Type Article in Periodical
Magazine / Source Physical Review A
MU Faculty or unit

Faculty of Informatics

Citation
Field Theoretical physics
Keywords quantum entanglement
Description We analyze how entanglement between two components of a bipartite system behaves under the action of local channels of the form $E \otimes I$. We show that a set of maximally entangled states is by the action of $E \otimes I$ transformed into the set of states that exhibit the same degree of entanglement. Moreover, this degree represents an upper bound on entanglement that is available at the output of the channel irrespective of what the input state of the composite system is. We show that within this bound the entanglement-induced state ordering is "relative" and can be changed by the action of local channels.
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