Year: 2025
Type: article
Abstract: Accurate measurements with implications in many branches of physics have been accessed using conventional techniques in Penning traps within a temperature regime where each eigenmotion of a charged particle is still a classical harmonic oscillator. Cooling the particle directly or indirectly with lasers allows reaching the quantum regime of each oscillator, controlling subtle effects in the precision frontier by detecting photons instead of electric currents. In this paper, we present a new in-vacuum optical system designed to detect 397-nm fluorescence photons from individual calcium ions and Coulomb crystals in a 7-T Penning trap. Based on the outcome of computer simulations, our design shows diffraction-limited performance. The system has been characterized using a single laser-cooled ion as a point-like source, reaching a final resolution of 3.69(3) μ m and 2.75(3) μ m for the trap’s axial and radial directions, respectively, after correcting aberrations.
Source: EPJ Quantum Technology
Authors: Joaquín Berrocal, Daniel Rodríguez
Institution: Universidad de Granada
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,190
Awards: G1011868522, G1692386732, G1770942398, G1901050173, G1929800771, G2262748287, G3330090618, G3480869486, G425668148, G4430281269, G451917667, High-Performance Mass Spectrometry Using a Quantum Sensor, G4715280697, G5967599077, G5992962802, G6033112984, G6571180143, G6605876617, G670131467, G7084143925, G7919674532, G8505530720, G8684520763
OpenAlex ID: W4410599884