The Strontium Molecular Lattice Clock

This thesis describes how the rich internal degrees of freedom of molecules can be exploited to construct the first clock based on ultracold molecules, rather than atoms. By holding the molecules in an optical lattice trap, the vibrational clock is engineered to have a high oscillation quality factor, facilitating the full characterization of frequency shifts affecting the clock at the hertz level. The prototypical vibrational molecular clock is shown to have a systematic fractional uncertainty at the 14th decimal place, matching the performance of the earliest optical atomic lattice clocks. As part of this effort, deeply bound strontium dimers are coherently created, and ultracold collisions of these Van der Waals molecules are studied for the first time, revealing inelastic losses at the universal rate. The thesis reports one of the most accurate measurements of a molecule's vibrational transition frequency to date. The molecular clock lays the groundwork for explorations into terahertz metrology, quantum chemistry, and fundamental interactions at atomic length scales.

Nominated as an outstanding PhD Thesis by Columbia University, USA Details the first construction and characterization of the first clock based on ultracold molecules Reports one of the most accurate measurements of a molecule's vibrational transition frequency to date

Auteur
Kon H. Leung is an AWS-Quantum postdoctoral scholar at the California Institute of Technology. Leung is an Associate of the Royal College of Science, having earned a BSc in physics from Imperial College London. Leung received a PhD from Columbia University under the direction of Tanya Zelevinsky and was granted the Edward Prince Goldman Scholarship in Science.

Contenu

Chapter 1: Introduction.- Chapter 2: Molecular structure and production of ultracold 88 Sr 2 in an optical lattice.- Chapter 3: Frequency comb assisted spectroscopy of the states.- Chapter 4: Ultracold 88 Sr 2 molecules in the absolute ground state.- Chapter 5: Terahertz vibrational molecular clock.

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