Hannover 2020 – wissenschaftliches Programm
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A 21.3: Vortrag
Mittwoch, 11. März 2020, 14:30–14:45, f342
Vanishing-polarizability states of trappd Rydberg ions — •Fabian Pokorny, Chi Zhang, Gerard Higgins, and Markus Hennrich — Department of Physics, Stockholm University, 10691 Stockholm, Sweden
Trapped Rydberg ions are a novel approach for quantum information processing . By combining the high degree of control of trapped ion systems with the long-range dipolar interactions of Rydberg atoms , fast entanglement gates may be realized in large ion crystals [1,3].
Recently, we carried out a controlled-phase gate in a two-ion crystal with a gate time of 700ns and more than 70% entaglement fidelity . In order to implement such a gate in large or even multidimensional ion crystals, Rydberg states with vanishing polarizability may be crucial to mitigate otherwise considerable line-broadening caused by phonon-dependent energy shifts of bare Rydberg states [4, 5]. Here we report the realization of microwave-dressed Rydberg states with vanishing polarizability. We observed negligible energy shifts even in presence of excess micro-motion and performed Rabi oscillations between low-lying electronic states and vanishing-polarizability Rydberg states with only Doppler cooling.
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