Efficient rotational cooling of Coulomb-crystallized molecular ions by a helium buffer gas

A. K. Hansen, O. O. Versolato, Ł. Kłosowski, S. B. Kristensen, A. Gingell, M. Schwarz, A. Windberger, J. Ullrich, J. R. Crespo López-Urrutia and M. Drewsen ()
Additional contact information
A. K. Hansen: The Danish National Research Foundation Center for Quantum Optics – QUANTOP, Aarhus University, DK-8000 Aarhus C, Denmark
O. O. Versolato: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Ł. Kłosowski: Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
S. B. Kristensen: The Danish National Research Foundation Center for Quantum Optics – QUANTOP, Aarhus University, DK-8000 Aarhus C, Denmark
A. Gingell: The Danish National Research Foundation Center for Quantum Optics – QUANTOP, Aarhus University, DK-8000 Aarhus C, Denmark
M. Schwarz: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
A. Windberger: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
J. Ullrich: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
J. R. Crespo López-Urrutia: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
M. Drewsen: The Danish National Research Foundation Center for Quantum Optics – QUANTOP, Aarhus University, DK-8000 Aarhus C, Denmark

Nature, 2014, vol. 508, issue 7494, 76-79

Abstract: In combination with sympathetic cooling of translational degrees of freedom (leading to Coulomb crystallization), cooling of the rotational degrees of freedom of magnesium hydride ions using a helium buffer gas leads to temperatures in a tunable range from 60 kelvin down to about 7 kelvin for a single ion, the lowest such temperature so far recorded.

Date: 2014
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DOI: 10.1038/nature12996

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