Bounds on action of local quantum channels

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Authors

ŠTELMACHOVIČ Peter BUŽEK Vladimír

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

Faculty of Informatics

Citation
Field Informatics
Keywords quantum information processing; local channel
Description We derive an upper bound on the action of a direct product of two quantum maps (channels) acting on bi-partite quantum states. Our results show that the fundamental distinction between the set of separable and the set of entangled states results in two different bounds which in turn can be exploited for discrimination between the two sets of states. We generalize our results to multi-partite channels.
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