M. Vidrighin, T. Bartley, G. Donati, Xian-min Jin, M. Barbieri, W. Kolthammer, A. Datta, I. Walmsley
{"title":"Requirements for two-source entanglement concentration","authors":"M. Vidrighin, T. Bartley, G. Donati, Xian-min Jin, M. Barbieri, W. Kolthammer, A. Datta, I. Walmsley","doi":"10.2478/qmetro-2013-0002","DOIUrl":null,"url":null,"abstract":"Abstract Entanglement enhancement is a key task for quantum technologies. This operation performed on states produced by parametric down-conversion sources has been the object of several recent experimental investigations. In particular, conditional preparation by photon-subtraction has been shown to improve the entanglement of these states. Here we analyse the role played by non-Gaussian and Gaussian measurements in more general entanglement concentration operations performed on a pair of two-mode squeezed vacua. We find stringent requirements for achieving an improved entanglement enhancement by measuring jointly these two resource states.","PeriodicalId":421179,"journal":{"name":"Quantum Measurements and Quantum Metrology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2013-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quantum Measurements and Quantum Metrology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2478/qmetro-2013-0002","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Abstract Entanglement enhancement is a key task for quantum technologies. This operation performed on states produced by parametric down-conversion sources has been the object of several recent experimental investigations. In particular, conditional preparation by photon-subtraction has been shown to improve the entanglement of these states. Here we analyse the role played by non-Gaussian and Gaussian measurements in more general entanglement concentration operations performed on a pair of two-mode squeezed vacua. We find stringent requirements for achieving an improved entanglement enhancement by measuring jointly these two resource states.
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