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dc.contributor.advisorIsaac L. Chuang.en_US
dc.contributor.authorChen, Zilong, 1981-en_US
dc.contributor.otherMassachusetts Institute of Technology. Dept. of Physics.en_US
dc.date.accessioned2006-05-15T20:25:19Z
dc.date.available2006-05-15T20:25:19Z
dc.date.copyright2003en_US
dc.date.issued2004en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/32721
dc.descriptionThesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, June 2004.en_US
dc.descriptionIncludes bibliographical references (p. 89-91).en_US
dc.description.abstractQuantum bang-bang control is a method of suppressing decoherence in qubits [VKL99, VL98]. To date, mathematically rigorous treatments of quantum bang-bang control offered little intuition. To complement existing approaches and to seek better understanding, I present intuitive pictures to think about quantum bang-bang control. In addition, I develop a formalism for treating phase noise moments of a qubit under quantum bang-bang control. Although the desired purpose of quantum bang-bang control is to remove noise, it is conceivable that it can be used to infer information about the noise process and coupling on a qubit. By using a simple random rotation model of single qubit dephasing, I demonstrate how quantum bang-bang control can distinguish between dephasing under different stochastic processes. I also show how quantum bang-bang control can determine noise coupling in a toy model where noise couples to the qubit via a fixed noise axis. These two demonstrations indicate the potential of quantum bang-bang control as a tool for qubit noise spectroscopy.en_US
dc.description.statementofresponsibilityby Zilong Chen.en_US
dc.format.extent91 p.en_US
dc.format.extent4403746 bytes
dc.format.extent4408015 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsM.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582
dc.subjectPhysics.en_US
dc.titleTowards qubit noise spectroscopy by quantum bang-bang controlen_US
dc.typeThesisen_US
dc.description.degreeS.B.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Dept. of Physics.en_US
dc.identifier.oclc56050903en_US


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