Robustness bounds and practical limitations of quantum key distribution [Elektronische Ressource] / von Aeysha Khalique

ROBUSTNESSBOUNDSANDPRACTICALLIMITATIONSOFQUANTUMKEYDISTRIBUTIONVom Fachbereich Physikder Technischen Universit˜at Darmstadtzur Erlangung des Gradeseines Doktors der Naturwissenschaften(Dr. rer. nat.)genehmigteDISSERTATIONvonAeysha Khalique, M. Phil.aus Sargodha (Pakistan)Darmstadt 2008D17Referent: Prof. Dr. Barbara DrosselKorreferent: Prof. Dr. Robert RothTag der Einreichung: 31.7.2007Tag der Mundlic˜ hen Prufung:˜ 25.6.2008ToUS and Our FamilyScientiflc thoughts are common heritage of mankindAbdus SalamVerily in the heavens and the earth, are Signs for those who believe. And inthe creation of yourselves and the fact that animals are scattered (throughthe earth), are Signs for those of assured Faith. And in the alternation ofNight and Day, and the fact that Allah sends down Sustenance from thesky, and revives therewith the earth after its death, and in the change ofthe winds,- are Signs for those that are wise.Al-Quran 45:3-5AbstractQuantum information theory is a modern branch of theoretical physics. Oneof its main goals is to interpret concepts of quantum physics. This leads toa deeper understanding of quantum theory. The most common examples ofpracticalapplicationsofbasicquantumtheoryarequantumcomputationandquantumcryptography. Quantumcryptographyprovidessecurecommunica-tionbetweenlegitimateuserseveninthepresenceofanadversarybymakingpossible the distribution of a secret key.