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Preprints



March 2024: Manuscript on phononic bright and dark states

We have submitted our manuscript Harry Parke, et al., Phononic bright and dark states: Investigating multi-mode light-matter interactions with a single trapped ion arXiv:2403.07154.

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In this work we experimentally investigate a new formalism to describe interference effects, based on collective states which have enhanced or suppressed coupling to a two-level system. We observe the emergence of phononic bright and dark states for both a single phonon and a superposition of coherent states and demonstrate that a view of interference which is based solely on their decomposition in the collective basis is able to intuitively describe their coupling to a single atom.

February 2024: Manuscript on motional state analysis

We have submitted our manuscript Marion Mallweger, Milena Guevara-Bertsch, et al., Motional state analysis of a trapped ion by ultra-narrowband composite pulses, arXiv:2402.10041 .

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In this work. we present a method for measuring the motional state of a trapped ion. Our technique uses ultra-narrowband composite pulses on the blue sideband transition to scan through the populations of the different motional states. It is applicable both inside and outside of the Lamb-Dicke regime. For higher phonon numbers especially, the composite pulse sequence can be used as a filter for measuring phonon number ranges.

May 2020: Manuscript on magic trapping

We have submitted our manuscript Fabian Pokorny, Chi Zhang, Gerard Higgins and Markus Hennrich, Magic trapping of a Rydberg ion with a diminished static polarizability, arXiv:2005.12422.

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In this work we report the realization of a microwave-dressed Rydberg states with vanishing polarizability. In this way, we make the Rydberg ion insensitive to low-frequency electric fields. This allows us to achieve magic trapping of a Rydberg system for the first time. We demonstrate Rabi oscillations between a low-lying electronic state and the magically trapped Rydberg state.