Abdel Karim, Omar (2024) Realization of a new experimental apparatus for the microscopic control of individual ytterbium atoms. [Tesi di dottorato]

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• The transcriptional function of the Fe65-AICD complex. (deposited 29 Lug 2008)
  • Realization of a new experimental apparatus for the microscopic control of individual ytterbium atoms. (deposited 17 Ott 2025 14:39) [Attualmente visualizzato]

Abstract

In recent decades, cold-atom systems have been extensively exploited to explore various intriguing quantum phenomena that arise at extremely low temperatures. The ability to cool atoms down to near absolute zero and the high degree of controllability offered by laser trapping have enabled numerous studies and experiments, demonstrating remarkable achievements in quantum information processing, metrology and quantum. This thesis presents the development of a novel experimental platform, as part of the OrbiDynaMIQs project, aimed at probing impurity problems using ytterbium atoms in optical tweezers. Optical tweezers provide precise control and resolution over individual atoms, introducing a new tool for simulating complex Hamiltonians, like the investigation of dynamic effects under non-equilibrium conditions connected to Kondo physics. The work begins with an overview of optical tweezer traps and a detailed description of the experimental setup. It then compares the performance of six-beam and five-beam magneto-optical traps (MOTs) for all isotopes of interest (174Yb, 171Yb,173Yb). We demonstrate the successful loading of single atoms for 174Yb and 173Yb starting from a five-beam MOT, eliminating the need for a sixth beam to pass through the objective lens. Two advanced imaging techniques are described, both achieving high fidelity and survival probabilities for 174Yb, 173Yb. The first, molasses imaging, cools atoms during imaging within the trap, achieving nearly 100% fidelity and survival probability. The second, fast imaging, enables rapid detection with a 97% survival probability in less than 100 µs. This work establishes a robust and versatile experimental platform for studying impurity physics and out-of-equilibrium quantum phenomena. It demonstrates the capability to load single atoms in optical tweezers for all isotopes of interest while enabling high-fidelity, non-destructive readout.

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