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dc.contributor.authorO'Brien, J.en_US
dc.contributor.authorPryde, G.en_US
dc.contributor.authorWhite, A.en_US
dc.contributor.authorRalph, T.en_US
dc.contributor.authorBranning, D.en_US
dc.date.accessioned2017-04-24T12:34:44Z
dc.date.available2017-04-24T12:34:44Z
dc.date.issued2003en_US
dc.date.modified2009-09-24T05:53:26Z
dc.identifier.issn00280836en_US
dc.identifier.doi10.1038/nature02054en_AU
dc.identifier.urihttp://hdl.handle.net/10072/15488
dc.description.abstractThe promise of tremendous computational power, coupled with the development of robust error-correcting schemes, has fuelled extensive efforts to build a quantum computer. The requirements for realizing such a device are confounding: scalable quantum bits (two-level quantum systems, or qubits) that can be well isolated from the environment, but also initialized, measured and made to undergo controllable interactions to implement a universal set of quantum logic gates. The usual set consists of single qubit rotations and a controlled-NOT (CNOT) gate, which flips the state of a target qubit conditional on the control qubit being in the state 1. Here we report an unambiguous experimental demonstration and comprehensive characterization of quantum CNOT operation in an optical system. We produce all four entangled Bell states as a function of only the input qubits' logical values, for a single operating condition of the gate. The gate is probabilistic (the qubits are destroyed upon failure), but with the addition of linear optical quantum non-demolition measurements, it is equivalent to the CNOT gate required for scalable all-optical quantum computation.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent236753 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherNature Publishing Groupen_US
dc.publisher.placeLondon, Englanden_US
dc.publisher.urihttp://www.nature.com/nature/index.htmlen_AU
dc.relation.ispartofpagefrom264en_US
dc.relation.ispartofpageto267en_US
dc.relation.ispartofissue6964en_US
dc.relation.ispartofjournalNatureen_US
dc.relation.ispartofvolume426en_US
dc.subject.fieldofresearchcode240402en_US
dc.subject.fieldofresearchcode249999en_US
dc.titleDemonstration of an all-optical quantum controlled-NOT gateen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2003 Nature Publishing Group. 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.en_AU
gro.date.issued2003
gro.hasfulltextFull Text


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