Formation of Two-Ion Crystals by Injection from a Paul-Trap Source into a High-Magnetic-Field Penning Trap

• URL: http://arxiv.org/abs/2203.16933v1
• Date: Thu, 31 Mar 2022 10:32:48 GMT
• Title: Formation of Two-Ion Crystals by Injection from a Paul-Trap Source into a High-Magnetic-Field Penning Trap
• Authors: Joaqu\'in Berrocal, Emilio Altozano, Francisco Dom\'inguez, Manuel Jes\'us Guti\'errez, Javier Cerrillo, Francisco Javier Fern\'andez, Michael Block, Christian Ospelkaus and Daniel Rodr\'iguez
• Abstract summary: Two-ion crystals constitute a platform for investigations of quantum nature. Ions are produced either internally by photoionization or externally in a (Paul-trap) source. Laser cooling of the two-ion crystal in a strong magnetic field towards reaching the quantum regime is presented.
• Score: 0.0975153823429076
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Two-ion crystals constitute a platform for investigations of quantum nature that can be extended to any ion species or charged particle provided one of the ions in the crystal can be directly laser-cooled and manipulated with laser radiation. This paper presents the formation of two-ion crystals for quantum metrology in a 7-tesla open-ring Penning trap. $^{40}$Ca$^+$ ions are produced either internally by photoionization or externally in a (Paul-trap) source, transported through the strong magnetic field gradient of the superconducting solenoid, and captured in-flight with a mean kinetic energy of a few electronvolts with respect to the minimum of the Penning-trap potential well. Laser cooling of the two-ion crystal in a strong magnetic field towards reaching the quantum regime is also presented with particular emphasis on the cooling of the radial modes.

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