Quantum optics seminar
Dressed potentials with coherence control for trapped atom interferometry
Prof. Thomas Fernholz
University Of Nottingham
Abstract
ZOOM link: https://us02web.zoom.us/j/88535113048
ABSTRACT: On the quest to building a fully trapped atom interferometer, we investigate state-dependent trapping of ultra-cold rubidium atoms in radio-frequency dressed potentials. In this talk I will discuss trapping topologies for the implementation of a Sagnac interferometer that is sensitive to rotation. As the interferometer sequence is akin to the operation of an atomic clock, I will present our analysis of the radio-frequency dressed hyperfine spectrum. We identified suitable transition frequencies, clarified the compatibility of the required microwave polarisation with an atomchip trap, and experimentally investigated additional microwave dressing to reduce incoherent broadening in trapped thermal ensembles. I will also report on the current status of the atomchip-based interferometer setup.
ABSTRACT: On the quest to building a fully trapped atom interferometer, we investigate state-dependent trapping of ultra-cold rubidium atoms in radio-frequency dressed potentials. In this talk I will discuss trapping topologies for the implementation of a Sagnac interferometer that is sensitive to rotation. As the interferometer sequence is akin to the operation of an atomic clock, I will present our analysis of the radio-frequency dressed hyperfine spectrum. We identified suitable transition frequencies, clarified the compatibility of the required microwave polarisation with an atomchip trap, and experimentally investigated additional microwave dressing to reduce incoherent broadening in trapped thermal ensembles. I will also report on the current status of the atomchip-based interferometer setup.