Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/151885
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dc.titlePAST OF A QUANTUM PARTICLE AND QUANTUM INFORMATION PROCESSING WITH OPEN-SYSTEM NOISE
dc.contributor.authorLEN YINK LOONG
dc.date.accessioned2019-02-28T18:12:41Z
dc.date.available2019-02-28T18:12:41Z
dc.date.issued2018-10-17
dc.identifier.citationLEN YINK LOONG (2018-10-17). PAST OF A QUANTUM PARTICLE AND QUANTUM INFORMATION PROCESSING WITH OPEN-SYSTEM NOISE. ScholarBank@NUS Repository.
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/151885
dc.description.abstractThis thesis consists of two parts: (I) past of a quantum particle, and (II) quantum information processing with open-system noise. In Part I, we study the path taken by a quantum particle, after it has traversed an interferometer. In our analysis, “the particle’s path” has operational meaning as acquired by a path-discriminating measurement. We show that the particle’s path through the interferometer can be understood with common sense. Furthermore, we perform an experiment and obtain results that strongly support our theoretical analysis. In Part II, we study the performance of quantum error correction (QEC) on a system undergoing an open-system (OS) dynamics—the noise on the system originates from a joint quantum channel on the system-bath composite. We derive the conditions for perfect correctability, and provide a lower bound for the OSQEC performance when the noise is approximately correctable. As the initial state is important for specifying the dynamics of open systems, we also study the extraction of information about the system-bath initial state with measurements on the system alone.
dc.language.isoen
dc.subjectquantum path, quantum error correction, open system, quantum noise, interferometer, system-bath initial state
dc.typeThesis
dc.contributor.departmentCENTRE FOR QUANTUM TECHNOLOGIES
dc.contributor.supervisorENGLERT, BERTHOLD-GEORG
dc.description.degreePh.D
dc.description.degreeconferredDOCTOR OF PHILOSOPHY
dc.identifier.orcid0000-0003-4810-3917
Appears in Collections:Ph.D Theses (Open)

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