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dc.contributor.authorRalph, TC
dc.contributor.authorLund, AP
dc.contributor.authorWiseman, HM
dc.date.accessioned2017-05-03T11:51:15Z
dc.date.available2017-05-03T11:51:15Z
dc.date.issued2005
dc.date.modified2009-10-08T06:30:35Z
dc.identifier.issn1464-4266
dc.identifier.doi10.1088/1464-4266/7/10/007
dc.identifier.urihttp://hdl.handle.net/10072/4932
dc.description.abstractPhoton counting induces an effective non-linear optical phase shift in certain states derived by linear optics from single photons. Although this non-linearity is non-deterministic, it is sufficient in principle to allow scalable linear optics quantum computation (LOQC). The most obvious way to encode a qubit optically is as a superposition of the vacuum and a single photon in one mode-so-called 'single-rail' logic. Until now this approach was thought to be prohibitively expensive (in resources) compared to 'dual-rail' logic where a qubit is stored by a photon across two modes. Here we attack this problem with real-time feedback control, which can realize a quantum-limited phase measurement on a single mode, as has been recently demonstrated experimentally. We show that with this added measurement resource, the resource requirements for single-rail LOQC are not substantially different from those of dual-rail LOQC. In particular, with adaptive phase measurements an arbitrary qubit state a|0> + ߼1> can be prepared deterministically.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent97519 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherInstitute of Physics Publishing Ltd
dc.publisher.placeBristol, UK
dc.publisher.urihttps://iopscience.iop.org/article/10.1088/1464-4266/7/10/007
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefromS245
dc.relation.ispartofpagetoS249
dc.relation.ispartofjournalJournal of Optics B: Quantum and semiclassical optics
dc.relation.ispartofvolume7
dc.rights.retentionY
dc.subject.fieldofresearchcode240402
dc.titleAdaptive Phase Measurements in Linear Optical Quantum Computation
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2005 Institute of Physics Publishing. 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.
gro.date.issued2005
gro.hasfulltextFull Text
gro.griffith.authorWiseman, Howard M.


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