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Ancilla-assisted sequential approximation of nonlocal unitary operations

URN to cite this document:
urn:nbn:de:bvb:355-epub-218336
Saberi, Hamed
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Date of publication of this fulltext: 22 Aug 2011 10:12


Abstract

We consider the recently proposed "no-go" theorem of Lamata et al [Phys. Rev. Lett. 101, 180506 (2008)] on the impossibility of sequential implementation of global unitary operations with the aid of an itinerant ancillary system and view the claim within the language of Kraus representation. By virtue of an extremely useful tool for analyzing entanglement properties of quantum operations, namely, ...

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