Physics – Atomic Physics
Scientific paper
2012-02-13
Physics
Atomic Physics
Made Graphics black & white print compatible, clarified abstract and summary
Scientific paper
Sympathetic cooling of trapped ions has become an indispensable tool for quantum information processing and precision spectroscopy. In the simplest situation a single Doppler-cooled ion sympathetically cools another ion which typically has a different mass. We analytically investigate the effect of the mass ratio of such an ion crystal on the achievable temperature limit in the presence of external heating. As an example, we show that cooling of a single Al+ with Be+, Mg+ and Ca+ ions provides similar results for heating rates typically observed in ion traps, whereas cooling ions with a larger mass perform worse. Furthermore, we present numerical simulation results of the rethermalisation dynamics after a background gas collision for the Al+/Ca+ crystal for different cooling laser configurations.
Amairi Sana
Mandel Olaf
Schmidt Piet O.
Wübbena Jannes B.
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