Trapping and Ground-State Cooling of a Single H$_2^+$

• URL: http://arxiv.org/abs/2212.06456v2
• Date: Fri, 20 Oct 2023 13:52:10 GMT
• Title: Trapping and Ground-State Cooling of a Single H$_2^+$
• Authors: N. Schwegler, D. Holzapfel, M. Stadler, A. Mitjans, I. Sergachev, J. P. Home, and D. Kienzler
• Abstract summary: We study the chemical lifetime of H$+$ and its dependence on the apparatus temperature, achieving lifetimes of up to $11+6_-3$ h at 10 K. Our results provide a basis for quantum logic spectroscopy experiments of H$+$, as well as other light ions such as HD$+$, H$_3+$, and He$+$.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate co-trapping and sideband cooling of a H$_2^+$ - $^9$Be$^+$ ion pair in a cryogenic Paul trap. We study the chemical lifetime of H$_2^+$ and its dependence on the apparatus temperature, achieving lifetimes of up to $11^{+6}_{-3}$ h at 10 K. We demonstrate cooling of two of the modes of translational motion to an average phonon number of 0.07(1) and 0.05(1), corresponding to a temperature of 22(1) $\mu$K and 55(3) $\mu$K respectively. Our results provide a basis for quantum logic spectroscopy experiments of H$_2^+$, as well as other light ions such as HD$^+$, H$_3^+$, and He$^+$.

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