Quantum behavior in mesoscopic systems

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dc.check.embargoformatNot applicable
dc.check.infoNo embargo requireden
dc.check.opt-outNot applicableen
dc.contributor.advisorBusch, Thomas
dc.contributor.authorLo Gullo, Nicolino
dc.contributor.funderIrish Research Council for Science Engineering and Technologyen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderOkinawa Institute of Science and Technology Graduate University, Japanen
dc.date.accessioned2013-02-14T14:56:51Z
dc.date.available2013-02-14T14:56:51Z
dc.date.issued2013-01
dc.date.submitted2013-01
dc.description.abstractIn this thesis I present the work done during my PhD. The Thesis is divided into two parts; in the first one I present the study of mesoscopic quantum systems whereas in the second one I address the problem of the definition of Markov regime for quantum system dynamics. The first work presented is the study of vortex patterns in (quasi) two dimensional rotating Bose Einstein condensates (BECs). I consider the case of an anisotropy trapping potential and I shall show that the ground state of the system hosts vortex patterns that are unstable. In a second work I designed an experimental scheme to transfer entanglement from two entangled photons to two BECs. This work is meant to propose a feasible experimental set up to bring entanglement from microscopic to macroscopic systems for both the study of fundamental questions (quantum to classical transition) and technological applications. In the last work of the first part another experimental scheme is presented in order to detect coherences of a mechanical oscillator which is assumed to have been previously cooled down to the quantum regime. In this regime in fact the system can rapidly undergo decoherence so that new techniques have to be employed in order to detect and manipulate their states. In the scheme I propose a micro-mechanical oscillator is coupled to a BEC and the detection is performed by monitoring the BEC with a negligible back-action on the cantilever. In the second part of the thesis I give a definition of Markov regime for open quantum dynamics. The importance of such definition comes from both the mathematical description of the system dynamics and from the understanding of the role played by the environment in the evolution of an open system. In the Markov regime the mathematical description can be simplified and the role of the environment is a passive one.en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLo Gullo, Nicolino. 2013. Quantum behavior in mesoscopic systems. PhD Thesis, University College Cork.en
dc.identifier.urihttps://hdl.handle.net/10468/964
dc.language.isoenen
dc.publisherUniversity College Corken
dc.relation.urihttp://arxiv.org/pdf/1107.0750v2.pdf
dc.relation.urihttp://arxiv.org/pdf/1011.2125v3.pdf
dc.relation.urihttp://arxiv.org/pdf/0912.1305v2.pdf
dc.rights© 2013, Nicolino Lo Gulloen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectMesoscopic systemsen
dc.subjectQuantum coherenceen
dc.subjectUltracold gasen
dc.subject.lcshQuantum theoryen
dc.thesis.opt-outFALSE
dc.titleQuantum behavior in mesoscopic systemsen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD (Science)en
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