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Identifier 000423098
Title Radio-frequency adiabatic potentials for guided atom-clock interferometry
Alternative Title Αδιαβατικά δυναμικά ραδιοκυμάτων για οδηγούμενη συμβολομετρία ατομικών ρολογιών.
Author Mas, Hector Peris L.
Thesis advisor Ρακιτζής, Πέτρος-Θεόδωρος
Klitzing, von Wolf
Abstract Trapped and guided matterwave interferometry holds the promise of a step-change in the sensitivity of measurements such as gravity or rotation. This thesis studies the proposal of a Sagnac clock-type trapped-atom interferometer based on the independent manipulation of two hyperfine spin sub-states of Rubisium 87 (Rb87) in a coherent matter-wave guide. I demonstrate the loading of a Radio-Frequency (RF) dressed Bose Einstein Condensate (BEC) in the Time Averaged Adiabatic Potential (TAAP) ring waveguide and the state-dependent transport of atomic clouds in such trap.These beam-splitters in a clock-type atom interferometer are multi-photon Microwave (MW) transitions between RF-dressed states. This thesis studies these transitions in two trapping schemes. Firstly, it explores the dressed atom MW spectrum and the sources of decoherence in the clock transition with atoms trapped in a crossed-dipole optical potential. Secondly, it expands this work to magnetically trapped atoms in adiabatic potentials. In this case, we propose and test a novel bi-chromatic RF-dressed potential with which the line-width of the clock transition can be reduced by one order of magnitude, reaching coherence times of τ~ 20ms.
Language English
Subject BEC
Quantum metrology
Κβαντική μετρολογία
Υλικών κυμάτων
Issue date 2019-07-08
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Physics--Doctoral theses
  Type of Work--Doctoral theses
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