Sympathetic cooling of a trapped proton mediated by an LC circuit

Abstract

Efficient cooling of trapped charged particles is essential to many fundamental physics experiments, to high-precision metrology, and to quantum technology. Until now, sympathetic cooling has required close-range Coulomb interactions, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. Here we demonstrate sympathetic cooling of a single proton using laser-cooled Be+ ions in spatially separated Penning traps. The traps are connected by a superconducting LC circuit that enables energy exchange over a distance of 9 cm. We also demonstrate the cooling of a resonant mode of a macroscopic LC circuit with laser-cooled ions and sympathetic cooling of an individually trapped proton, reaching temperatures far below the environmental temperature. Notably, as this technique uses only image-current interactions, it can be easily applied to an experiment with antiprotons, facilitating improved precision in matter-antimatter comparisons and dark matter searches.

11 pages, 7 figures

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• Hybrid quantum systems with trapped charged particles
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Cited by in corpus (15)

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• Coupling two laser-cooled ions via a room-temperature conductor
• Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap
• Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators
• BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
• Optical stimulated-Raman sideband spectroscopy of a single ${}^9$Be${}^{+}$ ion in a Penning trap
• Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap
• In-situ-tunable spin-spin interactions in a Penning trap with in-bore optomechanics
• Strong coherent ion-electron coupling using a wire data bus
• Quantum Logic Spectroscopy of an Electron and Positron for Precise Tests of the Standard Model
• Engineering artificial atomic systems of giant electric dipole moment
• Adaptable platform for trapped cold electrons, hydrogen and lithium anions and cations
• Sympathetic cooling of charged particles in Penning traps using electron cyclotron radiation
• A Coupled-Oscillators Model to Analyze the Interaction between a Quartz Resonator and Trapped Ions
• Formation of Two-Ion Crystals by Injection from a Paul-Trap Source into a High-Magnetic-Field Penning Trap