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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper EC1_5

Preparation of an Ion Chain Consisting of Ca+ and In+ with a Specified Arrangement

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Abstract

Sympathetic cooling of ions in a linear trap is a powerful tool for preparing quantum systems in low temperatures without need for direct laser cooling of the target ions. Single ions are identified as non-fluorescing spots inserted between fluorescing coolant ions in a live image taken by a high-sensitivity camera. Highresolution spectroscopy of molecular ions has been demonstrated by exploiting this feature [1]. Recently, the most basic configuration, consisting of an Al+ and a Be+, has been successfully employed to demonstrate one of the most precise optical clocks by quantmn logic spectroscopy [2]. Implementation of the target ions to a coolant ion chain with specified arrangements is prerequisite to such applications. We report experimental studies for preparing chains consisting of a few Ca+ and In+ ions. We found combination of simple methods, such as resonant photo-ionization, potential-depth control and real-time imaging, is enough for preparing ion chains in prescribed arrangements.

© 2009 IEEE

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