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dc.contributor.authorDalla Pozza, Nicola
dc.contributor.authorWiseman, Howard
dc.contributor.authorH. Huntington, Elanor
dc.date.accessioned2017-09-05T00:32:00Z
dc.date.available2017-09-05T00:32:00Z
dc.date.issued2015
dc.identifier.issn13672630en_US
dc.identifier.doi10.1088/1367-2630/17/1/013047en_US
dc.identifier.urihttp://hdl.handle.net/10072/151000
dc.description.abstractThe preparation stage of optical qubits is an essential task in all the experimental setups employed for the test and demonstration of quantum optics principles. We consider a deterministic protocol for the preparation of qubits as a superposition of vacuum and one photon number states, which has the advantage to reduce the amount of resources required via phase-sensitive measurements using a local oscillator ('dyne detection'). We investigate the performances of the protocol using different phase measurement schemes: homodyne, heterodyne, and adaptive dyne detection (involving a feedback loop). First, we define a suitable figure of merit for the prepared state and we obtain an analytical expression for that in terms of the phase measurement considered. Further, we study limitations that the phase measurement can exhibit, such as delay or limited resources in the feedback strategy. Finally, we evaluate the figure of merit of the protocol for different mode-shapes handily available in an experimental setup. We show that even in the presence of such limitations simple feedback algorithms can perform surprisingly well, outperforming the protocols when simple homodyne or heterodyne schemes are employed.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherInstitute of Physics Publishingen_US
dc.publisher.placeUnited Kingdomen_US
dc.relation.ispartofpagefrom013047-1en_US
dc.relation.ispartofpageto013047-16en_US
dc.relation.ispartofjournalNew Journal of Physicsen_US
dc.relation.ispartofvolume17en_US
dc.subject.fieldofresearchQuantum Information, Computation and Communicationen_US
dc.subject.fieldofresearchQuantum Opticsen_US
dc.subject.fieldofresearchcode020603en_US
dc.subject.fieldofresearchcode020604en_US
dc.titleDeterministic preparation of superpositions of vacuum plus one photon by adaptive homodyne detection: experimental considerationsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
dcterms.licensehttp://creativecommons.org/licenses/by/3.0en_US
dc.description.versionPublisheden_US
gro.rights.copyright© The Author(s) 2015. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the authors and the title of the work, journal citation and DOI.en_US
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