High-efficiency cluster-state generation with atomic ensembles via the dipole-blockade mechanism

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Title High-efficiency cluster-state generation with atomic ensembles via the dipole-blockade mechanism
Author Zwierz, Marcin; Kok, Pieter
Journal Name Physical Review A
Year Published 2009
Place of publication United States
Publisher American Physical Society
Abstract We demonstrate theoretically a scheme for cluster-state generation, based on atomic ensembles and the dipole-blockade mechanism. In the protocol, atomic ensembles serve as single-qubit systems. Therefore, we review single-qubit operations on qubit defined as collective states of atomic ensemble. Our entangling protocol requires nearly identical single-photon sources, one ultracold ensemble per physical qubit, and regular photodetectors. The general entangling procedure is presented, as well as a procedure that generates in a single step Q-qubit GHZ states with success probability p_success~η^Q∕2, where η is the combined detection and source efficiency. This is significantly more efficient than any known robust probabilistic entangling operation. GHZ states form the basic building block for universal cluster states, a resource for the one-way quantum computer.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1103/PhysRevA.79.022304
Copyright Statement Copyright 2009 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 79
Issue Number 2
Page from 022304-1
Page to 022304-9
ISSN 1050-2947
Date Accessioned 2011-12-05
Language en_US
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Quantum Information, Computation and Communication; Quantum Optics; Quantum Physics
URI http://hdl.handle.net/10072/42828
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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