20742.量子糾纏蒸餾與非局域性蒸餾方案設(shè)計(jì)

1、獨(dú)創(chuàng)性聲明本人聲明所呈交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。據(jù)我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得安徽大學(xué)或其他教育機(jī)構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說明并表示謝意。張對(duì)內(nèi)泓鰳期：V盛年jR達(dá)日‘學(xué)位論文版權(quán)使用授權(quán)書本學(xué)位論文作者完全了解安徽大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，有權(quán)保留并

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3、sforquantuminformationprocessing，meanwhiletheyarefundamentalconceptsinquantuminformationscienceQuantumentanglementplaysanimportantroleinquantumteleportation，quantumcommunication，quantumcomputationandSOon，andnonlocalitypl

4、aysakeyroleilltheareaofquantumcr)ptogaphyJntheprocessofquantuminformationprocessing，inordertoguaranteethequalityofquantumcolnmunicationstateswithhigherdegreeofentanglementareneeded，SOweneedtoconductdistillationoperationo

5、ntilepracticallyavailablenon—maximallyentangledstatesVialocaloperationsandclassicalCOlnmunicationsonecanimproveentanglementandapproachthemaximallyentangledstateBeingsimilartoentanglelnentdistillation，nonlocalitydistillat

6、ionneedslocaloperationtoo，butthereisstilldifferencebetweenentanglementdistillationandnonlocalitydistillationDuringtheprocessofdistillation!localoperationsandclassicalcommunicationsareneededforentanglementdistillation：but

7、theclassicalcolnmunicationisnotpermittedfornonlocalitydistillation，andonlylocaloperationsareneededInthisthesis，wefocusonentanglementdistillationandnonlocalitydistillationmainresearchworkiSasfollows1Weproposedaschemeforen

8、hancingandexpandingremotephotonicentanglementvialocalfiIteringoperationsjandtilemixedentangledstatetobedistilledistheCollinsGisinstateFirstlywedesignedthemainentanglementdistillationprocesswiththehelpofauxiliaryphotonsan

9、dnon—destructivemeasurement；Secondlywefoundthatthegarbagestatescanberedistilled；FinallythroughcomparingthefidelitiesoftilestatesbeforeandafterthedistillationprocessweconcludethattheentanglementCallbeenhancedbyadjustingth

10、erelatedparametersproperly2WeproposedthedistillationschemeformuhipartiteentanglementbylocalfilteringoperationsWiththehelpofpositiveoperatorvaluedmeasures(POVMs)，theentanglementdistillationofamplitudedampedGHZstateandthea