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Mode shaping in mixed ion crystals of 40Ca2+ and 40Ca+ |
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| Authors: | T. Feldker L. Pelzer M. Stappel P. Bachor R. Steinborn D. Kolbe J. Walz F. Schmidt-Kaler |
| Affiliation: | 1. QUANTUM, Institut für Physik, Universit?t Mainz, Staudingerweg 7, 55128, Mainz, Germany 2. Helmholtz-Institut, 55099, Mainz, Germany 3. Deutsches Zentrum für Luft- und Raumfahrt e. V., Institut für Technische Physik, Pfaffenwaldring 38-40, 70569, Stuttgart, Germany |
| Abstract: | We present studies of mixed Coulomb crystals of 40Ca+ and 40Ca2+ ions in a linear Paul trap. Doubly charged ions are produced by photoionization of trapped 40Ca+ with a vacuum ultraviolet laser source and sympathetically cooled via Doppler cooled 40Ca+ ions. We investigate experimentally and theoretically the structural configurations and the vibrational modes of these mixed crystals. Our results with 40Ca2+ are an important step towards experimental realization of the proposals for mode shaping in a linear crystal and spin-dependent configuration changes from zigzag to linear as proposed by Li et al. (Phys Rev A 87:052304, 2013) and Li and Lesanovsky (Phys Rev Lett 108:023003, 2012) using ions excited to Rydberg states. |
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