Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Sympathetic Cooling"”.
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Integration of Trapped Ion System and Sympathetic Cooling with Multi-isotope Ions
… heating-induced decoherence, and efficient cooling mechanisms, by investigating multi-species or isotope ion chains with sympathetic cooling techniques. The study explores loading ion chains with 174Yb and 138Ba species, using an Nd:YAG ablation laser for isotope-selective trapping. A detail …
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Experiments with interacting Bose and Fermi gases
… trapped fermionic atoms evolved from the first cooling experiments which produced quantum degenerate samples to becoming one of the most exciting branches of current atomic physics research. This thesis covers experiments done throughout this period, which can be grouped in three sets of …
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Ultracold Molecules: The Effect of Electromagnetic Fields
… calculations, it is then shown that the sympathetic cooling of NH($^3\Sigma^-$) molecules with Mg atoms has a good prospect of success, a first for a neutral molecular system. Detailed quantum scattering calculations are performed for a wide range of collision energies and magnetic field …
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Interaction of trapped ions with trapped atoms
… polarizability of Yb. The theory and limits of sympathetic cooling of ions by localized cold atoms at low temperature is outlined. Measurements of momentum-transfer collisions between Yb+ and Rb are presented indicating that momentum-transfer collisions affect the ion energy at the Langevin …
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A Trapped Single Ion Inside a Bose-Einstein Condensate
… neutral atoms. A first synergetic effect is the sympathetic cooling of the trapped ions to very low temperatures through collisions with the ultracold neutral gas and thus without applying laser light to the ions. We observe the dynamics of this effect by measuring the mean ion energy after …
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Quantum Controlled Collisions and Magnetic Trapping of Ultracold NaLi Molecules
… collisions in the ultracold regime and sympathetic cooling of ²³Na⁶Li by evaporative cooling of ²³Na in the magnetic trap. Lastly, this thesis presents the numerical and theoretical approach to finding a window for an all-optical creation of molecules using Raman transitions from ²³Na …
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A tunable Bose-Einstein condensate for quantum interferometry
… at easily accessible magnetic field values. The cooling of this particular atomic species presents many difficulties, both for the laser and evaporative cooling processes. For this reason, this was the last alkaline atom to be condensed. Its condensation up to now was only possible by employing …
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Mixed Species Ion Chains for Scalable Quantum Computation
… barium ions are directly cooled using Doppler cooling, while the ytterbium ions are sympathetically cooled by the barium. For radial modes strongly coupled to ytterbium ions the average thermal occupation numbers vary between 400 and 12,000 depending on ion species configuration and trap …
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Towards the formation of a forward-boosted beam of neutral antihydrogen for gravitational studies
… antihydrogen formation instead of positronium cooling). The principal piece of hardware is the main vacuum chamber, hosting the cryostat, the magnets system and the traps. The magnet system divides the traps into two zones, one at 5T and one at 1 T: in the first region, the capture trap is …