{"title":"Quantum channel-estimation with particle loss: GHZ versus W states","authors":"J. M. E. Fraïsse, D. Braun","doi":"10.1515/qmetro-2016-0009","DOIUrl":null,"url":null,"abstract":"Abstract We consider quantum channel-estimation for depolarizing channels and phase-flip channels extended by ancilla qubits and fed with a GHZ orWstate. After application of the channel one or several qubits can be lost, and we calculate the impact of the loss on the quantum Fisher information that determines the smallest uncertainty with which the parameters of these channels can be estimated.","PeriodicalId":421179,"journal":{"name":"Quantum Measurements and Quantum Metrology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quantum Measurements and Quantum Metrology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/qmetro-2016-0009","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
Abstract We consider quantum channel-estimation for depolarizing channels and phase-flip channels extended by ancilla qubits and fed with a GHZ orWstate. After application of the channel one or several qubits can be lost, and we calculate the impact of the loss on the quantum Fisher information that determines the smallest uncertainty with which the parameters of these channels can be estimated.
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