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Enhancing qubit readout through dissipative sub-Poissonian dynamics

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D'ANJOU, Benjamin, William A. COISH, 2017. Enhancing qubit readout through dissipative sub-Poissonian dynamics. In: Physical Review A. 96(5), 052321. ISSN 2469-9926. eISSN 2469-9934. Available under: doi: 10.1103/PhysRevA.96.052321

@article{DAnjou2017Enhan-40787, title={Enhancing qubit readout through dissipative sub-Poissonian dynamics}, year={2017}, doi={10.1103/PhysRevA.96.052321}, number={5}, volume={96}, issn={2469-9926}, journal={Physical Review A}, author={D'Anjou, Benjamin and Coish, William A.}, note={10 pages, 6 figures. Two appendices have been added. This version is close to the final published version Article Number: 052321} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:contributor>D'Anjou, Benjamin</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:abstract xml:lang="eng">Single-shot qubit readout typically combines high readout contrast with long-lived readout signals, leading to large signal-to-noise ratios and high readout fidelities. In recent years, it has been demonstrated that both readout contrast and readout signal lifetime, and thus the signal-to-noise ratio, can be enhanced by forcing the qubit state to transition through intermediate states. In this work, we demonstrate that the sub-Poissonian relaxation statistics introduced by intermediate states can reduce the single-shot readout error rate by orders of magnitude even when there is no increase in signal-to-noise ratio. These results hold for moderate values of the signal-to-noise ratio (S≲100) and a small number of intermediate states (N≲10). The ideas presented here could have important implications for readout schemes relying on the detection of transient charge states, such as spin-to-charge conversion schemes for semiconductor spin qubits and parity-to-charge conversion schemes for topologically protected Majorana qubits.</dcterms:abstract> <dc:date rdf:datatype="">2017-11-30T09:15:38Z</dc:date> <dc:creator>Coish, William A.</dc:creator> <dcterms:issued>2017</dcterms:issued> <dc:creator>D'Anjou, Benjamin</dc:creator> <dc:language>eng</dc:language> <dspace:isPartOfCollection rdf:resource=""/> <dc:contributor>Coish, William A.</dc:contributor> <dcterms:isPartOf rdf:resource=""/> <bibo:uri rdf:resource=""/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dcterms:title>Enhancing qubit readout through dissipative sub-Poissonian dynamics</dcterms:title> <dcterms:available rdf:datatype="">2017-11-30T09:15:38Z</dcterms:available> </rdf:Description> </rdf:RDF>

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