Quantum behavior in mesoscopic systems

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dc.contributor.advisor Busch, Thomas
dc.contributor.author Lo Gullo, Nicolino
dc.date.accessioned 2013-02-14T14:56:51Z
dc.date.available 2013-02-14T14:56:51Z
dc.date.issued 2013-01
dc.date.submitted 2013-01
dc.identifier.citation Lo Gullo, Nicolino. 2013. Quantum behavior in mesoscopic systems. PhD Thesis, University College Cork. en
dc.identifier.uri http://hdl.handle.net/10468/964
dc.description.abstract In 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.relation.uri http://arxiv.org/pdf/1107.0750v2.pdf
dc.relation.uri http://arxiv.org/pdf/1011.2125v3.pdf
dc.relation.uri http://arxiv.org/pdf/0912.1305v2.pdf
dc.rights © 2013, Nicolino Lo Gullo en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ en
dc.subject Mesoscopic systems en
dc.subject Quantum coherence en
dc.subject Ultracold gas en
dc.subject.lcsh Quantum theory en
dc.title Quantum behavior in mesoscopic systems en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD (Science) en
dc.internal.availability Full text available en
dc.check.info No embargo required en
dc.description.version Accepted Version en
dc.contributor.funder Irish Research Council for Science Engineering and Technology en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Okinawa Institute of Science and Technology Graduate University, Japan en
dc.description.status Not peer reviewed en
dc.internal.school Physics en
dc.check.opt-out Not applicable en
dc.thesis.opt-out FALSE
dc.check.embargoformat Not applicable

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© 2013, Nicolino Lo Gullo Except where otherwise noted, this item's license is described as © 2013, Nicolino Lo Gullo
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